I think the biggest take away concern is that Microsoft is looking to close up their OS platform, impart more regulations on development, and ultimately squeeze control. Steam looking to Linux is not a good sign. Maybe it's not what it looks like and it turns out well but if they are trying to run Windows like they run the 360 I'd be concerned. Windows has always been the OS of choice that does everything, if they start locking up their enviroment people will start to flock to Linux and Unix or never upgrade from W7.
Before the PS3 everyone was nice to me :(