Can say the same thing about the controller. If 720 and PS4 don't have a tablet controller they're not next gen either. Both statements are ridiculous and show you that some people are not looking at "all" the hardware
If watchdogs cannot be played on a tablet controller but mario wii u can then only the latter is a next gen game? How about starwars 1313 vs. Batman armored edition 2 wii u exclusive? Only the latter which is visually inferior to an xbox 360 game is next gen?