There is no such thing as "best console". It goes by preference.

Wii is family/party console. Mostly rated E games. The best games they have are made by the Nintendo company.

360 has best online gaming and is focused more on gaming then the other consoles. But 360s break a lot which is mad gay.

PS3 is the best multimedia machine. Its the best for what it has built in since the 360 doesn't have Wifi or Blu-Ray and Wii doesn't have Blu-Ray.

Wii games coming out that I know of...

The Conduit
Deadly Creatures

360 games coming out that I know of...

Gears of War 2
Too Human 1,2,3 (its a trilogy game)
Mass Effect 2
Fable 2

PS3 games coming out that I know of...

Resistance 2
MotorStorm 2
Uncharted 2
Killzone 2
Gran Turismo 5
Brave Arms
Chain Limit
Second Season 01
WarDevil
Little Big Planet
Twisted Metal
WipeOut
Final Fantasy Versus
God of War 3