Technical issues aside, Metroid Prime 3 does a more than adequate job of conveying the picture it wants to paint. Yes, 360/PS3 games look better, Metroid is by no means a bad or a bad looking game. The original Star Wars trilogy was amazing and entertaining. Did George Lucas enhancing the special effects make the movies themselves any better? Metroid is awesome, and will be remembered when this gen is over as one of the best. A lot of graphically superior games will not be able to make that claim.
I know because I'm from the future.