Tron: Legacy is a genuine sequel to the visually impressive but dramatically underwhelming Tron, in form, failings and flash. Jeff Bridges’ Kevin Flynn has been stuck inside his computer program for 20 years, a dispirited hippie with an attractive digital companion, Quorra (Olivia Wilde). His grown son Sam (Garrett Hedlund) finds his way into the super-sexy, Daft Punk-scored world, eventually uniting with his father and friend to oppose the elder Flynn’s dark side avatar. As with the original, the computer environment dazzles while logic and potential depth---such as the totalitarian dangers of our own tech---is glossed over. And why do computer programs go to the disco? We may never know. But for those who love cutting edge eye candy, here be sharp sweetness.