If Obama wins the nomination can he even beat McCain in the general election?

I think McCain is going to play his trump card "experience". Not to mention years of legislative accomplishments. McCain also has not followed Bush like many of the other Republicans have, so he can argue that too. Obama says he wouldnt' have voted for the war in Iraq, but that's easy to say since he wasn't even a senator at the time... Is Obama's only come back "Hope and Change" and could that win him the election???