Some games are built to be played with controllers. I've got a Steambox hooked up in my living room with a wireless XBox controller dongle, so I can fire it up

Some games are built to be played with controllers. I've got a Steambox hooked up in my living room with a wireless XBox controller dongle, so I can fire it up in big picture mode and play controller-oriented games from the comfort of my couch, then go into my office and play an FPS on the same Steam account with kb+m. I also have a wired Xbox controller in my office if I don't feel like moving to the big screen. Both work equally well. The "everything on one account" approach is really, really nice. All my save information is transparently synced across devices, and I can buy something from my computer (or even from my phone) and play it in my living room without any hassle.