Considering the game is already outputting in 1080p, at 60fps (which is something not even half of current-gen games can manage doing on more powerful consoles), and the models look ten times more gorgeous and rounded than Brawl's which were also mired by a tepid color palette and unnatural textures, it's amazing that they managed to get 8-player Smash working in general. The game looks spectacular enough already.
I'm legitimately amazed at how much they're not holding back as far as Smash Wii U goes. Any concerns of Smash 3DS being some sort of hindrance to the sheer content and capability of the Wii U's version were dashed in under 30 minutes. It's quite incredible how Smash manages to push the envelope yet again.