Tron was a successful avant-gardist film, so Disney decided to make an other one called Tron Legacy. What a great opportunitiy for science-fiction addicts such as Daft Punk. This is not only a half-revolutionnary duo, but also visual artists. Remember they hired this famous anime team to create Interstella 5555 a few years ago. This long maga illustrated their second album.
You already know they only work behind robot masks.Those french guys are indeed quite nerdy. They do love computer stuff, and win grammys with it. It is so logical for them to work for the new Tron movie because they simply were young fans of the first one.