It's missing about 20 buttons (and modifier keys) to be able to act as a keyboard in games...
I hate this thing, and I hate it because it's going to cripple the shit out of any pc game that's trying to cater to it.
You know how shit attempts at UI's for traditional PC rpgs and RTS games were on consoles?
Remember how badly pc centric games suffer design and gameplay wise when they are turned multiplatform? (e.g far cry 3 : sprint, ads, not enough binds to bind the syringes, can't hold more weaps than you can fit on a dpad to select)
Comin to a pc exclusive franchise you used to love soon, courtesy of the steam controller.
May this thing die the miserable death it deserves before it can do any lasting damage to how games are designed on PC