Off the top of my head, we've seen Peggle Nights, Spore, The Witcher Enhanced Edition, Crysis Warhead, Warhammer Online: Age of Reckoning, Rock Band 2, Star Wars: The Force Unleashed, LEGO Batman and Samba de Amigo.
That's not even taking downloadable console games into account--Duke Nukem 3D hit Xbox Live Arcade yesterday, the PlayStation Store receives Wipeout HD later today, and Mega Man 9 arrived via WiiWare Monday, followed by a PS Store release today and an Xbox Live Arcade debut next week.
I don't know where I'm going to find the time (or the money) to play them all, but I'm not complaining. It's been a while since we've had a flood of quality such as this. And hey, are you really going to argue with the LEGO Batman?