Seriously...it's always like that. The first round of games aren't so great, but when developers learn to harness the power and utilize everything they have, it'll get better.
Just look at the Xbox and FarCry: Instincts. UbiSoft utilized everything they could from the Xbox hardware and the result was a game far superior to the PC version in terms of graphics, gameplay and physics. I hope EA and VALVe learn to do this when they make Half-Life 2 for the Xbox...