Here's a quick video rundown of all the Wii U-specific features you can expect from Resident Evil Revelations.
I gave it a go on the Xbox 360, but I think I'll end up buying the Wii U version after seeing this. Between the maps right at your fingertips, the touchscreen puzzle stuff, and the ability to use either your television or the Wii U Gamepad for play, I'm sold.
The fun Miiverse features are the icing on the top. I expect to be using that speaking from the dead feature quite often.