I know I've been waiting a long time for Nintendo to be able to make games with top quality graphics. As much as I hate to admit it, graphics do count for how good a game is to some extent. I'm hoping for some metroid or Zelda games to come out on it, but ZombieU seems like it is going to be great.
Really though, an update to online play should be the biggest improvement. That controller with its own screen seems awesome too.