Everything I can tell about the Nuvola is that it's nothing more than a mini-PC with Android and apps. Apparently, there's also a Windows version for more money (to cover the s/w license). Since it's using apps, they likely include one to access and play their NanoFlix UHD content, whatever that is. It's a streaming device, same as any other PC on a network really. Actually, not much different that a PS3, PS4, etc., but without the gaming support or optical reader. And if it is an app, there's no reason that it couldn't play or be ported to support additional hardware except they want to drive sales of their box. No different than the need to use an Xperia tablet with the puck.
You could probably start with this similar Intel NCU
, add Windows, memory, and a SSD and get similar results. Probably better hardware too for less (or wait for a NCU with HDMI 2.0 down the road). However, the Nuvola is geared toward the masses that don't have the time or patience to mess with a computer. So, they'll buy a cube instead and get sold on the "4K UHD" support logo. Ugh. As we know, HDMI 1.4 supports 4K, so this is nothing special really. Just be sure you know what you're buying before hitting enter with your payment.
The way I see it, this device is nothing ground-breaking and it's success will ultimately be based on it's support, ability to be upgraded, and (mainly) the UHD content. Show me more concerning the later and then we'll talk.Edited by stevenjw - 1/7/14 at 10:55am