Print off a dozen responses and reread on Nov 6th.
Careful what you wish for. A McCain victory wouldn't necessarily be a good thing for the GOP and an Obama loss wouldn't necessarily be a bad thing for the Dems.
At this moment, I don't think Obama's time has come. And I don't think he'll get nominated again. But he'll be a model the Dems will be looking for in the future, I suspect. They'll remember the thrills in the Spring and Summer and will try to recreate that*. If so, expect a lot of messiah appearances in years evenly divisible by four and and a lot of disappointments in November.
*They've been trying to recreate Vietnam, Watergate, and 1969 for decades. Man, they had fun. Good times. Kumbayah.