Rolls Royce answered questions about their horse power with „adequate“ for decades. Not everyone is a nerd.
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I’ve not seen it mentioned if it will handle Atmos via HDMI (I assume it will at least handle quad/surround via HDMI?). If so, will it be able to also handle Atmos + DSP, like convolution?
No.
Hardware has nothing to do with it. Roon software does not recognize any Dolby Atmos codec.
AJ
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I’m not buying nor can afford a Rolls Royce and if I could specs wouldn’t matter to me. But since I want to get as much value based on what I can afford, specifications and capabilities are very important to me. 
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But many can afford an N1 and my point is exactly what you now wrote:
Wasn’t their other sales ploy about asking the price !!
If you can’t afford it you wouldn’t be interested 
Are you thinking about Bristol cars? “If you have to ask the price, you can’t afford one”.
That was it , I thought it was Rolls Royce
Never quite been in my league so …
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The only showroom was near Berkeley Square, it was wonderful but as intimidating as the best/worst independent record shop in 1979!
Everything PCM from quad to 7.1 multichannel via HDMI, even 192K, is handled with ease by much weaker cores according to my experienced. DSD multichannel is a bit more demanding, but I would assume the Nucleus One can handle everything up to DSD128 6-channel easily, maybe even more.
100,000 tracks is not a hard threshold but rather an estimate. If the structure of your library is not too complex for roon (by number of artists, references, big files, unidentified albums and alike) the core might use less of RAM and CPU power so it might handle a library of 120k or 150k as well.
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No nucleus is able to send native DSD over HDMI. It has to be converted to PCM, first. Or you have some exotic endpoint supporting DSD over dCS or DoP.
If you want to use DSP on DSD (esp. multichannel) roon now says this will be limited from some degree since the One is not powerful enough. Convolution filter e.g. on DSD is very likely not possible with native DSD processing. Maybe be with PCM conversion, first.
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I think this is a great step forward and useful for people who have no interest in building their own NUC.
I am still using the NUC that I built 7 years ago! This was the first and only time I have done this. I have spoken to several friends and colleagues (all educated, most to doctor/doctorate level) and none are interested in having anything home built or needing to be installed. My husband (doctorate level, senior lecturer and IT lead) has no idea what to do if anything happens to Roon, Tidal or the home network. I think having the CPU/ amount of installed RAM etc. is likely to put some of my friends/ colleagues off.
I appreciate that you can build your own, more powerful NUC for £100 cheaper. However, the time spent looking at how to do this, learning a new skill that you have no interest in, is likely to cost more than me working an extra hour or two as a locum/ extra-hours at work.
If my NUC fails, I would strongly look at this if it was available in the UK.
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Bet it will be a lot more than $499 0r £395.29p @ today’s currency exchange prices. when it hits UK shores… We are ripped off all the time… We will see.
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What has education got to do with building something that just needs a bit of common sense…??
Digital music isnt that good yet that the fan would make any difference… I think all the SMPS power supplies have a much larger inpact on sonics. The melco N100 bridge has a medical grade SMPS ’ but put a shortwave radio next to it and it howls!
I was trying to make the point that they consider themselves educated and capable, but would not even attempt to build a NUC. From some of the other comments, there is a suggestion that it is easy and just takes a bit of reading around. A lot of people I know would not even consider building a NUC as it is outside their comfort zone, and not because they are not competent in other fields.
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Some people will want to build a NUC and others wont… Skillsets and Hobbies can vary widely from educational level
I’ve been toying with computers since I was a kid. I have built my own computers for many years. And getting my Mac Mini to run my Roon Server was very easy to do.
However. I am seriously considering to just get a Nucleus One should the day arrive that my 10 year old Mini says “enough is enough”. I guess I’m more of the Plug & Play type of person these days.
Why reinvent the wheel, ehm I mean building a NUC, when a similar priced prebuild device can do the same thing.
I agree with you there.
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I did IT tech support, development, and project management for DECADES. But I’m no longer hands on, spending most of my time in program management and coaching younger project managers.
A few years ago, I built my main endpoint myself, using a generic Windows-based device and installing Bridge, which works well. But I would NOT have been interested in buying and building a NUC-based device, installing Rock OS, etc. - next endpoint I buy, I want something basically plug-and-play.
So I’ve pre-ordered Nucleus One 
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So far beyond PCM multichannel works via HDMI, we have no specifics, especially regarding multichannel SACD and any added DSP. We just have a general statement that some combinations may not work.
Despite me providing specific examples of my use case, I still don’t have any answers from Roon.
Perhaps us multichannel fans are too niche. I’m afraid, like you said, we would have to buy and try, or reply on other owners here to test more specific use cases.
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