I know a few years ago there was a big push toward linix based PC's with Windows-like shells. They were really trying to push into the entry level, and linix shaved the cost of an OEM XP off of it. As far as I know, they went nowhere and linix is still the domain of the geek. I suspect it'll be the same here. Geeks will be all over it because it's what they do. Google and M$ will just make their products cheaper (Apple doesn't need to bother) and the mainstream will continue to buy what they know works.
If you are a geek, this is probably pretty exciting. If it means that you can scavenge obsolete hardware (which nowadays is about 9 months) and slap your own OS into it, that'll be pretty cool.