Hamilton is used to winning, even though he's the rookie. He's also the most complete rookie since Schumi, with no obvious weaknesses. Aside from maybe being a little "unsympathetic" to his machinery.
Alonso has shown his true colours, he just plain doesnt like the competition - but he's still just a little better than Hamilton, if Hamilton improves or Alonso cracks he's fucked though.
Raikkonen has decided money and poon are better than success, and Massa doesnt quite have that something needed to step up.
So, er Hamilton to do it.