Something that poeple need to keep in mind is that the Core Game itself is what makes a video game fun. The graphics are a nice side dish to have but poeple generally don't enjoy games just becuase they look pretty.
I do congratulate the Factor 5 developers. The feel that the Wii's full potential needs to be exploited. Not like those lazy developers (remember Marvel Ultimate Alliance on Wii? It's fun but looked worse than a ps2 game).
Basically, even if you made an absolutely Beautiful version of E.T. from Atari 2600 it would still be a horrible game nonetheless. Playability comes first.