Steam on iOS or Android would look very much like the Game Center and OpenFeint, in that there would be leaderboards, achievements, and social networking. The advantage might be that the community would combine the home and mobile experiences, much like Microsoft is trying to do with their Xbox LIVE integration on Windows Phone 7.
A mobile version of Steam is more likely going to come to Android, only because of the restrictions of Apple's App Store and Game Center. iPodNN theorizes that the app could be reduced to the social networking functions of Steam, allowing only community interaction and download-queues, rather than actual gaming.
But because a Steam app would combine everything we love, we're going to remain optimistic. What do you think? Is the fragmentation of mobile gaming starting to make your head spin?
source: Valve via iPodNN