I like the concept as a very early prototype to have a multiple screen setup to carry with you. I use dual screen all the time at my office desk and I do miss it when I'm on the road. Using a big TV or projector doesn't quite do it for me. And even with the iPad/Tablet remote screen solutions it is a little fiddly and not the best of experiences.
I do find it hard to attach the label innovation to it, sure it is changing something existent but multi screen has been done before, people get the benefit, I think loads of people would like it when mobile, but this is not the way to go about it. The thing is huge, to big to be effective when on the road. The ergonomic positioning is absolutely terrible, working on a normal laptop with laptop height screen isn't healthy, but with this setup it is even worse. Then if the argument is that it isn't used for long, then it begs the question as to why bother?
I do think we will see larger more immersive screens, but it won't hit the mainstream until the technology changes and a mobile device becomes truly mobile. This reminds me of the original portable computers, I used to call them luggable, they were great as they had a full size keyboard included to cover the screen and floppy drive. Where they fell down and just didn't get popular was the size and weight.
But hey it is doing its job for Razor - people are talking about them. Great marketing stunt.
For those youngsters who have no idea of what I'm talking about, may I present you the mighty IBM 5155
30 pounds, 9" inch display with CGA!!! graphics

, two! yes two! 5.25inch floppy disk drives, 4.77Mhz (yes that is Mega not Giga) processor and 256K RAM. Did its job just fine, I happily programmed the automation of a fibre->cloth factory on that thing.
And to go with it, my mobile phone. I'll spare you the images as it may include 80s designer clothing
Funny how everything goes into circles and becomes heavy again and is called innovation.