Earlier quoted context omitted.
Given their work with the Steam Link and Steam Controller, I think you have a valid point. Steam Link supports DualShock and XBox controllers, and can stream via network from a PC located elsewhere in the house, making PC a viable competitor in the "couch gaming" space that consoles have thus far dominated.
Erm. When you play Call of Duty on PS/xBox, you're playing with controller against other people with same controllers. When you'll join a PC server with your steam controller, you will have 0 kills and 20 deaths, because everyone is playing with a mouse. That is not fun. Steam controller helps with, I don't know, 10% of the gaming - the single player. And if you're casual and single player is 100% of your games - hel…
That is very fun.
As for local co-op on PC, it could use some improvement, but there are already more local co-op PC games on Steam than Wii U.
http://store.steampowered.com/tag/en/Local%20Co-Op/#p=0&tab=...