Opening Ubisoft's conference with a 2D platformer is a brave move, but makes sense when you realise that game is the brain-child of Michael Ancel.
Rayman Origins had some nice little nods to the wider world of games. you can see that demo in full (including the cracking Tetris moment) in the video of the presentation - GTRV being at hand to capture the whole thing on camera.
You can also check out a whole heap of screens as well.