I agree, the 2008 STR was performing beautifully for Vettel on that day, I think it was attributed to the Ferrari engine for all the straight-line speed, plus the STR had been shaping up over the past race weekends leading up to that date- not to detract from Seb's performance, but winning in a 2008 STR is not like winning in a Minardi or whatever the equivalent was. The fact is, winning cars make winning drivers. The driver is a big input, but they can only add up to say... 6 tenths!
That said I think we are in a Vettel-Red Bull era, no one knows, but I expect them to repeat next year too- I just think Newey has this Formula pegged and he is only refining their design, while everyone else is playing catch-up. Vettel has demonstrated the consistency to extract the fullest out of the car. I don't think Vettel is quite the racer as Alonso or Hamilton, but he has what it takes to manage a race, and besides with this years formula of DRS/Pirelli/KERS most passing takes place under a large performance disparity so he doesn't need to be such a swashbuckling overtaker.
I think they will reign until the new engine formula, and then there might be a change.