Big Win Hockey. I'm a huge hockey fan (there is a soccer version too), so this game is pretty cool. Instead of playing hockey, you manage a team. Its cool and frustrating at the same time, because my team sucks, lol. But its all in good fun.
GTA3 is another one. The game was awful on the iPad1 because it just couldn't handle the game. It still blows my mind that a game I grew up playing on a console (PS2) is now on my phone and iPad.
Can Knockdown 2 is full retina. Zombie Gunship, Red Bull World Tour, Hard Lines is kinda like the old Tron game from back in the day. Draw Something is also Retina I think. I know Words With Friends is.
Zinio for magazines if you don't want to use Newstand. Flipboard for quickly checking web blogs like TUAW and Engadget.