i would say they have both changed film-making, contributed special effects and ideas to sci-fi and the media in general. also, at first trek's visuals were not that good anyway, so they remade TOS.
The Original series did make serious innovations in the fields of visual effects, but not on the scale of the first Star Wars movie, which came out 2 years before the first Star Trek movie. In fact, The Motion Picture was originally concieved as a response to the success of the then hugely innovative space opera; Star Wars.
Actually, Industrial Fire & Brimstone did the effects in Star Trek: First Contact.