My KDE Dr460nized is same as smooth.
I wouldn't like this touch-screen optimized UI as shown in the video demonstration.
But I get your point.
For a second there I thought the "AR" was meant to be "Augmented Reality" ... Now that kind of AR OS would of been something
That being said, I think this kind of DE would be more fitting for a mobile or a PC hooked up to a TV type of environment. Although... it could be a very useful DE for sight impaired people that are sitting at a desk even