Plenty of beautify effects will keep you in awe. Many of the effects were similar to Star Wars with extra neon added. Catwalks above infinite drops, dogfights, & lasers. Of couse the vehiciles in Tron have the ability to materialize out of smaller hand held devices.
As far as the story itself, I think that they did a good job. People new to Tron should be able to get a general sense of what is going on. However I look forward to the DVD release to go over some of the lines and get a deeper understanding of everything that went on. The ending seemed designed for a sequel. It left some questions unanswered.
Tony Stark's personality, strengths and weaknesses are nailed by Robert Downey Jr. and the writers. It was an excellent action flick with great effects and humor.