Another important feature that has been in trailers, but that I didn't get a chance to try out, is the sonar. It acts as a radar, allowing you to scan the environment for unseen enemies and (possibly) other hazards.

From the trailers it appears that moving the Wii U tablet around will allow you to cast the sonar in different directions, highlighting separate swathes of the environment to see what's hiding unseen behind doors and walls. Sure, plenty of games have radars, but few require you to take your eyes off the main screen to view them, so the sonar could definitely add to the tension in ZombiU.