Today, WWE issued an official press release that called WrestleMania 29 the highest-grossing WWE event ever.  The official release reads as follows:

STAMFORD, Conn., April 25, 2013 – WWE® (NYSE:WWE) today announced that WrestleMania 29, held Sunday, April 7 at MetLife Stadium in New Jersey, grossed an excess of $72 million, the highest grossing event in WWE history. In addition, WrestleMania 29 will once again exceed 1 million global pay-per-view buys and attracted a sold out crowd of 80,676 fans from all 50 states and 34 countries at MetLife Stadium.
New Orleans, Louisiana will be the site of next year’s WrestleMania, which will take place Sunday, April 6, 2014 at the Mercedes-Benz Superdome. Ticket information will be announced later this year.

This was a very high priced pay per view event ($59.99 for normal feed, $69.99 for HD feed) and it seems that price tag didn't scare anyone off.  Ticket prices were also higher than normal from reports I have heard.

One interesting fact is they only estimated the event to have topped 1 million buys in this press release, even though they quoted 1.2 million to Variety earlier in the day.  Either way, WrestleMania 29 was a success in this regard, even if it wasn't the best show ever.