Check it out. Gizmodo has an excellent article on what the real physics of space combat would be like. As you might imagine, Star Wars, Star Trek, Star Gate, Star-whatever-sci-fi-show-you-like, have got it completely and utterly long.
A movie or TV show that tried to portray realistic space combat would be admirable, but probably very boring in terms of action, and would have to be primarily plot and character driven with a strong focus on other factors besides a massive special effects budge to be successful. Now that I think about, maybe a movie or TV show that tried to portray realistic space combat would be pretty neat! Of course, I wouldn’t mind reading a good book that portrayed realistic space combat, either. Any suggestions?
Oh, and don’t forget to check out Atomic Rockets as well, a site dedicated to helping sci-fi authors, or anyone else (maybe even Hollywood writers… yeah right), get the physics of space propulsion and combat correct.