also the high framerate is not amazingPersonally, I don't this looks all that bad, but I can see where others in the thread are coming from. Graphically, the demo looks very impressive, but it doesn't accurately reflect the aesthetic of many Mario games (saturated colors, bright lighting, etc.).
Also, having to fight Bowser in such a dark environment would probably get annoying after a while, and force players to turn up the brightness settings on their monitors.