Unless they can get a bunch of developer on-board for *native* games, then nobody will care.
The "streaming games" thing is a red-herring. For some reason, everyone seems to think it's a great idea, and it *is*, but not as the PRIMARY way to play games. Especially if you need a fairly powerful PC with an Nvidia card to do so. Streaming over the internet is okay, but it's SO dependent on your connection quality (and your bandwidth limits). It can work, though, obviously. But I wouldn't want to be stuck with it for AAA titles.
Still, for $199, they might have something here - a relatively cheap and powerful console that runs Android software could be pretty cool. It would almost be like a return to the old "home computer" days.