Ryse is arguably the best looking game on the market. Even though PS4 is more powerful than XBO you would have to have two TV's setup side by side to really notice the difference between one or the other unless one game is running 60fps and the other at 30fps which is noticeable.
WiiU has some good looking games like X for example but WiiU is considered closer to X360/PS3 than PS4/XBO.
So with that said PS4 and XBO are comparable, possibly a XBOX vs PS2 Situation but the opposite now. WiiU on the other hand while has good looking artistic games, i dont think it could pull off a game like Ryse or Killzone Shadowfall
Also considering it is still early in the gen, the best has yet to come.