MaximumPC loved the idea but says it has its draw backs (obviously). The biggest being size. It can only support 4GB. After a full installation of XP (patched and such) you only have 500MB left. Games these days are massive. So on and so forth.
The first time I watched the video, I wasn't really sure what I was looking at. Second time, I noticed what it was and that was BLAZING fast. Did anyone else notice that the person showing the video types with one finger? That's pretty funny