I was in Indianapolis over the past weekend and I must say they've done an excellent job at hosting for this years Super Bowl. Lots of reporters have said the same thing.

NFL commissioner Roger Goodell spoke with the media this morning and said that it's a good possibility that Indy could host another Super Bowl in the future.
"I believe it's going to be a great week. I believe the community here could not have done a better job of organizing this week's events or embracing this. I think it's great Indianapolis is on the global stage" Goodell said.
The Super Bowl is set for the next few years: 2013 in New Orleans, 2014 in New York, and 2015 in Phoenix. That means the earliest that Indy could host another Super Bowl is 2016.
Source: Indy Star