For me Vettel will be the next to driver to win a third world title.
It is always difficult to predict the future in F1, mainly because the competitiveness of the car is such a big factor.
When Alonso won his second title in 2006 I am sure most people would have thought he would have won another by now especially if you told them he would be in a McLaren for one of those years and a Ferrari for two of them. But he hasn’t managed it yet, even though for a lot of people, myself included, he has been the best all round driver in F1 during that period.
When Hamilton won the championship in 2008 after coming so close in his debt season of 2007 everyone predicted he would win more titles, but he has failed to do so yet and if he doesn’t improve on his performances this season he won’t add to his one title.
When Scheckter won the drivers championship for Ferrari in 1979 I am sure no one would it would be 2000 until Ferrari, the biggest name in F1, managed to win another Drivers title.
Personally I think Red Bull and Vettel will be the team to beat again next season. Adrian Newey and Red Bull will manage to stay one step ahead of the field just as Ferrari managed to during their period of domination a decade ago.
The other teams may say they have plenty of innovations to catch up but experimenting and taking risks to close the gap doesn’t always work, just look at the never raced McLaren MP4-18 from 2003 or the Walrus nosed Williams FW26 which only managed to win a race when they reverted to a more conventionally front end, a victory which at the moment is sadly still the last one for Williams.
Some have commentated that the ban on blown diffusers will affect Red Bull more because they pioneered the concept, however the 2009 RB5 was designed around a normal single diffuser and yet it wasn’t that far behind the double diffuser Brawn at the start of the season.
I see no reason why the 2012 Red Bull should not be at least equal to it’s rivals and I think Vettel himself will only get better.