A obvious example would be ZombiU. I have no idea what they could've implemented for the menu screen when it got ported away, and I don't particularly care. Because that simply can't be replicated.
Though there are plenty of multiplats on the WiiU that don't take advantage of the systems features, and I'd still try them if I was downloading stuff. I might eventually get around to trying inferior ports of ZombiU too, if I find it cheap![]()