Steam is adding a lot of cool stuff, from android and iphone apps to turning steam workshop into a mod manager. The question is, what do you want to see next?
First I’d like to see a video recorder. IIRC, such a thing is in the works according to a Gaben interview. Also, as impractical as the controls would be, and as impractical as the whole concept would be, I think it’d be pretty cool to see goldsrc (with mod support) ported to android/iphone and all the goldsrc games added to the steam app. Hell, if we wanted to go really impractical here, source and all it’s games and mods too.
On the more practical side, I’d like to see the game “recommendations” system expanded to include comments and ratings and such. Also, perhaps a stat tracker tied to CS:GO, similar to origin’s battlelog just more in-depth. What guns are you good at? What maps and what locations in maps give you the highest k/d? What guns kill you the most? And other things that could help you improve your skills. And CS:GO would be perfect for it, being an ultra-competitive game.
Usually when a program expands it’s features, I go “da fuck is dis shit? I don’t want it.” But with steam, so far I’ve liked it.