A user on the Steam Powered forums who calls himself Political Gamer recently had a chance to check out Valve's headquarters as part of an interview. He took notes; here are his main points (although we'd like to point out that the whole story is definitely worth reading): Read the whole story
I'm not gonna pretend to be an expert but from what I understand Android uses just the linux kernel and not necessarily all the other libraries and such that make up a traditional linux desktop. This is also why you can't simply run any Android app on say Ubuntu. This link may help. http://www.linux-magazine.com/Online/News/How-Much-Linux-Is-in-Android
That will be a sad day indeed ,if it occurs. Can you imagine the wasted data use when you have to sign in to Steam every time you want to use your aps.Sure they will say there is an offline mode,what a laugh that is.I live in the country so I have 3g+ and I blew 500 megs of data on a supposedly off line mode of Civilization 5. Steam does not recognize you versions of Angry Bird please sign in Bam ,pay your phone provider for overage on your phone data plan
I agree with Emil, a game delivery platform for phones would be nice. Sony will have its own, but that would be limited to certain phones.
Most mac owners don't run dual boots. Although, it'd be nice if I didn't have to dual boot. anyway, I think this will be interesting to see as we can only speculate on what it would be like.
It is very unlikely that steam will make it to iOS. The Appstore licensing and acceptable use prohibits application from downloading and installing outside of iTunes. Kongregate tried to have an iOS app that allowed iPad/pod/phone users to run their flash game. Apple forced them to stop. This is why you will never see Steam on iOS.
I imagine the experience will be very limited on iOS. The apple app probably will allow users access to steam services to get information and maybe even make purchases by jumping to website. But I doubt installing apps as Apple is sure to block this... unless they work with apple. I imagine the Android version could have the best implementation. But who knows what kind of parity the different platforms will have.