Steam started out as a cool new way to buy PC games...the Steam sales are great.
BUT... with Steam getting into the hardware side of it, I see a problem.
Their machines are made to play with a controller and with their big picture mode, they are trying to have their cake and eat it too.
People will one day not be playing PC games with their desktop, but on their fat asses on the couch.
This leads to a change in gaming with less intricate games(whos going to read tons of RPG "stuff" across the room on their TV'S?
With your controller in hand Devs will shy away from making KB/M as the primary way to interact with the games we love..