[adouglas]

Oh, c'mon. SF movies blow the realism bit in all sorts of ways on a routine basis. Even if you accept conceits like FTL travel, force fields/beams and artificial gravity, you're still left with needing to portray the environment in a realistic way. And it's almost never done.

1) There is no sound in space.
2) You can't see a laser unless it passes through something (gas or dust cloud)
3) There is no sound in space.
4) Spaceships do not fly like airplanes.
5) There is no sound in space.
6) Streamlining is pointless in a vacuum.
7) There is no sound in space.
8) Distance causes a time lag in communications.
9) There is no sound in space.
10) Newton's three laws of motion always apply. Just sayin'.
11) There is no sound in space.
12) At realistic encounter distances, ships will be too far from one another to actually see clearly with the naked eye.
13) There is no sound in space....

You get the idea.

For a realistic SF movie, see 2001: A Space Odyssey. Artificial gravity produced in a realistic way (via centrifugal force), no sound in a vacuum, spacecraft actually designed with zero-G in mind, isolation caused by interplanetary distances, etc.