Ease of use
Ecosystem (apps, drivers, etc.)
Yes, we need new concepts. Yes, innovation is important. And that's what makes the whole 5 points I give. I still don't feel in a world where I could be really enjoying this. Maybe when internet is with me all the time and when I get a fast enough connection to feel like having my files living in the cloud, then I could really appreciate the benefits Chrome OS can bring. But today I still feel like a waste of time having files and every bit of my information going up and down each time I need it. Still, wonderful idea I hope some day it is possible to use it and still feel like working naturally because I still feel a little imprisoned having only my browser to work with. Not today, hopefully someday.
By the way, this thing works nicely in VM working inside linux.