Real shame that Dark Souls has been delayed until summer. Had been looking forward to that. That said..
I have Zelda, Mario, Mario Kart, Street Fighter, Tetris, Football Manager, Fifa, Shovel Knight and Mario Xcom/Rabbids downloaded on a handheld I can play anywhere. South Park on the way too. Phenomenal.
To anyone who didn't have a Wii U, I have a piece of advice:
Buy Donkey Kong Country Tropical Freeze when it comes out on May 4th. Might be the best 2D platformer of all time. Loads of replay-ability, extremely difficult, rewarding and gorgeous with one of the best soundtracks you will ever hear. Game deserves to sell well this time around.