Steam boxes should also be pretty open like that. Obviously you can already make a "PC game" that can run on a Steam box but, Newell promised the approval process of Steam will almost completely disappear in the future, so it should be even easier for game developers to put their games on Steam, and then having them distributed to any device that runs Steam.
I'm sorry I didn't mention Valve's steam as a competitor in the post, I am very very excited to see what they come up with. I <3 Valve. I do think Apple and Android have a little more indie developer momentum right now, but not sure how that will play out long-term.
