‘Many of the sports such as the track events will be shot in 3D or using robotic aerial cameras, while sporting events and ceremonies will be covered in 360-degree format or in time lapse. Both methods were used when shooting the royal weddings last year in England and Monaco.’
http://www.popphoto.com/news/2012/06/getty-will-capture-london-olympics-3d-and-360-degree-images