Biggest innovation in gaming this generation?

[Dgc1808]

Mmmm... Online I suppose.

Love Achievements/Trophies though.

EDIT: Guess I should give a reason.

I chose online because it was a huge factor that effected all platforms from the beginning of the gen and really effected the sales of games across the board. 

Motion Controls was a huge factor but mainly on the Wii. Other platforms aren't even seeing proper motion controls until halfway through the gen. Sixaxis was largely ignored and had nearly no impact on sales or game development what so ever.