> Steam Big Picture turns my big Windows machine at home into a game console and does the same for my Mac Mini.

Well it turned mine into a 2000s linux/wine debugfest flashback when I wanted to play GTA IV: Ballad of Gay Tony... Also don't get me started on having to keep the poweroff button pushed on the xbox controller for mouse emulation for games not having controller support in the menus. It is far from the polished experience you had, but possibly I just held it wrong.