Like last-year’s CGI 3D holiday spectacle Avatar, you need to see TRON: Legacy on the big screen. Unlike Avatar, you don’t need to see it. A sequel to 1982’s at-the-time state-of-the-art geekfest about a guy trapped in a computer, TRON: Legacy picks up 28 years later. Kevin Flynn (Jeff Bridges, reprising his role from the original) has been missing for 20 years, presumably lost somewhere in the grid the computer world he created years ago. His 27-year-old son Sam (Garrett Hedlund) goes in after him. There’s a story here about Kevin’s evil computer-generated twin wanting to take over the real world, but the movie is really about all the awesome stuff that happens in the grid. It’s a spectacular looking world, where digital lines, discs, and vehicles literally soar out of the screen (seriously see it in 3D if you’re going to see it). But it doesn’t amount to much there’s no eco message at the movie’s core. The story is a mere blur trapped in a noisy mess of cool techy toys.