Many people would have been mesmerized by watching the movie Tron because the way the world that is shown in the movie makes us to wonder, is it really possible to have a world similar to the world shown in the Tron for real?
Many people would imagine themselves living in a world similar to the one shown in the movie. Other people got other ideas, they like to live in this normal world than the fictional world shown in the movie.
If you are of the first category, then having this theme as windows desktop background would give a feel of living in a fictional world for sure.
Download this theme from here.