Director of Tron: Legacy speaking about “The Grid”, the virtual world in the movie, on his interview by Discover:

I really liked the idea that this was a closed-off system like the Galapagos Islands, where the simulation has been constantly evolving and growing on some server locked away in some hidden place. That way it felt more like a Western: The world is large and expansive, but at the same time, there’s a code or a set of rules you have to follow. If you want to send a message to someone, you can’t just beam it across cyberspace. You have to get on your light cycle and deliver it in person.

I saw the movie on Saturday and it’s quite the visual spectacle. Try to see it in IMAX and in 3D. And don’t worry if you haven’t seen or don’t remember the original.