Why Assassin's Creed 3 will be better on Wii U - Ubisoft

According to the Creative Director, having a map available on the Wii U GamePad screen will be important in Assassin's Creed 3 as it is the biggest game in the series yet.

"Assassin's Creed 3 is obviously an open world game and we're dealing with huge expanses. It's by far the biggest Assassin's Creed we've built to date so having a map - a larger map - at your disposal at all times is a big win. It allows you to plan your navigation, see when enemies are nearby so the bigger the map, the better in our universe."