GameInformer has a video interview with Capcom regarding the upcoming REmake HD. In the video, the game producer talks about the changes they made to the game, which includes new and updated lighting, normal mapping, shaders, control schemes, higher res texture and others. They also discussed a bunch of other miscellaneous stuffs about the game.

Near the end of the video, they also discussed a little about using it as an experience for a hypothetical remake for RE2 and 3.

http://www.gameinformer.com/b/featur...-remaster.aspx