I had another article that went into way more detail about the engines, but I can't find it.
Seems GM is going to cylinder deactivation and stop/start route to up their MPGs rather than drastic downsizing and turbocharging. I imagine the 3.6 (It's nearly a 3.7 now) will be going into the new Camaro. It's crazy that it's making levels of power that was exclusive to V8s not too long ago. I hope the 3.0TT stays Cadillac exclusive though.