I would quite like a remake of 1984. I didn't really like the movie, and I loved the book. I think it could now be made into a fantastic sci-fi film, I just think it may hit too close to home. V for Vendetta was a pretty good 1984-esque movie, though.
I would also say Animal Farm, but that actually is getting a movie soon, directed by Andy Serkis, so I am looking forward to that.
In terms of games, I'd quite enjoy HD remakes of the earlier Command & Conquer games. For the first 2, there's OpenRA, but they don't have the singleplayer campaigns. I'd like the gameplay to remain the same, just nice, high resolution graphics, and better quality cutscenes. It'll never happen, though. Seems the series is pretty much dead, sadly.