Aside from beng the graphics being remastered for new tech with updated rendering and lighting, DOOM 3 BFG Edition will also feature stereoscopic 3D support, 5.1 surround sound, Xbox 360 Achievements, PlayStation 3 trophies, improved, and a new checkpoint save system. The game also adds the armor-mounted flashlight, changing the flashlight mechanic from the original game.
If that weren't enough, DOOM 3 BFG Edition will also include all of the original DOOM and DOOM 2 games.
The BFG Edition will be released on PC, Xbox 360 and PlayStation 3 this Fall. DOOM 3 was originally released on PC and Xbox.