Wii U version of Watch Dogs will be the best.

[Damian.W]

If they use it in the same way they showed off the companion app on the PS4, (Being able to objects on the map using the touchscreen. https://www.youtube.com/watch?v=IVWAZUGZFjU)
Then yes, the Wii U version will be the absolute best, even to the PC version.
If not, I guess it will be better than the last gen versions...