I would rather put this here than make an annoying annotation. I will post this in the other descriptions for a period to get it attention, please sign and spread it to ANYWHERE you can. Thank you very much. :)
I want to put this in the recent Sonic videos (and here) since they're getting lots of views.
This is the small clip of actual Wii U gameplay from Watch_Dogs from Nintendo's E3 2013 Nintendo Direct.
Note the buttons shown, which match the Wii U.
However, there is VERY slim chance it's either the Xbox One version, or the PC version with fake buttons. But this is the best indication thus far. Plus you would think Nintendo would make sure to have shown the Wii U version.
UPDATE: I just learned that the footage is the same as a preview from a month ago, it shows the buttons there, so it may be the Xbox One version, or the PC version with said button layout which is possible. Sorry folks. :(