Ok, so I spent the extra money to see this one on the big screen IMAX theatre! As I suspected, Elysium, the world in space above Earth, was definitely patterned after my all time favorite sci fy writer, Larry Niven’s Ringworld. The shape of Elysium, and the mechanics of the world are identical to the Ringworld that Louis Wu finds himself on in 2850 AD. Elysium was on its own a great sci fi movie, lots of action, and Matt Damon was perfect for the role. My geek side would have liked more explanation or scenes with some of the technology, such as the brain transfer hardware, the medical beds, or of course Elysium itself. All told I enjoyed the movie and it will be another movie I will add to my DVD collection.