Valve demonstrates Steam Controller [video]
I was really skeptical about this and I'm getting more and more skeptical.1. See how he always lift his right hand thumb to reproduce the same movement, sometimes three times, just to go through the screen (in Civ5).2. Also the fact that buttons get mapped like a "pie chart" on the trackpads could have been a good idea, but we need buttons. We forget the luxury of having buttons with all those new tactile screens because we want more tactile surface, but for a controller we hold in our hands, we need some feedbacks bellow our fingers. This is really a bad idea...3. I'll have to admit that it looks like a better alternative than joysticks for FPS games.EDIT: As someone else pointed out, if you get two controllers : a valve one for FPS, RTS, games that works well with it, and a Xbox/PS4 controller for the rest, then it's a very good thing.