As I have already nominated my choices, so this dosen't count but I absolutley loved the film "Tron"
Made in 1982, it was one of the first films using computer animation inconjunction with live action sequences.
Loved the concept of the "MCP- Master Control Program" sucking Flynn into its system only for him to team up with the program TRON to bring down the MCP's control of the network.
Rumour has it that there is a new Tron film being made and set for release in 2011 - potentially called "TRON 2.0"
Have also heard that the band "Daft Punk" will compose the score to the film.
I cant wait