Originally Posted by Damien

A lot of it will be permanent (not to mention the housing, retail and transport improvements made as a result). The Velodrome is staying to be part of a new cycling complex and will bid to have UCI World Track Championships. The Olympic Stadium will also host the 2017 World Athletics championships. The Aquatics Centre will remain and likely be at the center of future bids as it will become the main aquatic centre for London. The Hockey Centre will host the 2015 European Hockey Championships.

It will also be a 'tech city' (offices and such replacing the media center and other temporary buildings). The Athletes village will be turned into homes. The area will be a 'urban park'. All in all it's going to be a nice place in London combining three new and large sporting centre-pieces, homes and businesses in a green and pleasant area of London.