Winter Olympics looks like it wants you to have fun; the bright colours, decent roster of events and characters, and the chipper commentator all make it seem like it's capable of creating entertainment. The poor online leaderboard, the confusing menu systems, and awkward control schemes, however, make the game a five-minute wonder that'll make you fear the next time Mario and Sonic get their friends together.
On the other hand, Mario Kart 8 is easy to pick-up, easy to enjoy, and no matter how good you are, there will be moments that make you smile. You don't have to spend hours perfecting your driving style, and memorising complex tracks; it's almost a 'Sonic Transformed lite'.
Steamworld Dig on the Wii U is the fifth release, and they're covering every platform for a reason. The game is addictive and a lot of fun. What the Wii U offers over and above the others is that you can play it both on the TV or solely on the gamepad.