I'm playing
Tomb Raider: Underworld (Xbox 360)

Fixing some of the issues that made Legend only pretty good, Underworld's focus is entirely on platforming, and it's all the better for it.

Collecting Dust
The Legend of Zelda: Twilight Princess (Wii)
It's the same Zelda we've been playing since 1998, tweaked and balanced to perfection.
Super Smash Bros. Brawl (Wii)
Four-player fighting returns with new characters like Wario, Pit from Kid Icarus - and yes, Solid Snake.
Halo Wars (Xbox 360)

Halo fans rejoice! RTS fans grieve!