Defictionalization: The technology used to frame Richards by digitally swapping his face with that of the real killer is now completely real.
Likewise, while the computer graphics technology to simulate all the other fake footage entirely from scratch is still rather expensive, the software and technical skill necessary to do so are all available to Hollywood and anyone else who can afford them.
Also a case of Technology Marches On: Many of Richards' "escape" methods wouldn't happen today, in a world of cell phone cameras and GPS. And much of the technology in the movie seems to consist of blinking lights.
Dolph Lundgren and Christopher Reeve were both considered for the role of Ben Richards. Can you imagine Ivan Drago or Clark Kent taking a chainsaw to a guy's genitals?
Andrew Davis was originally going to direct the film (after three previous directors pulled out) but was fired a week into production due to going overbudget and being four days behind schedule. Paul Michael Glaser (Starsky from Starsky & Hutch) finished the film.