Sony won't let Microsoft put out a new console, there's no chance. Nintendo can always be a bit of a wildcard and do whatever they want. I would imagine it's going to take longer for the next-generation consoles, probably 2012 for the PS4 and Xbox720. The WII could come anytime after 2010.
My Games of 2011:
The Legend of Zelda: Skyward Sword
Elder Scrolls V: Skyrim
Super Mario 3D Land
Uncharted 3: Drake's Deception