I could go on forever about upcoming games I'm excited about, but I guess I'll stick to just two for each of my favourite platforms. (And I'm super into indie games, you've been warned.) The games I'm most looking forward to right now:
PC : Mostly kickstarter or early development games coming to mind right now, but things like Hyper Light Drifter, The Long Dark.
Vita : Hard decision, but going to have to go with Wasteland Kings and Binding of Isaac: Rebirth.
PS4 : I don't want to buy a PS4 (at least right away) but the Rime and Everybody's Gone to the Rapture trailers from Gamescom looked amazing!