Playing devil's advocate...
2001 had music over top of space scenes. You can't hear music in space, never mind Dolby surround sound, so this was wrong. I think there was also music playing on ancient Earth, which is before music was invented.
I've also seen subtitled versions of 2001 (and lots of movies praised for their realism). This is wrong. When people speak in real life, glowing words don't magically appear beneath them.
One can argue that these are cinematic conventions that improve people's enjoyment. The music has emotional impact, and the subtitles make it easier to understand what is happening (especially with foreign languages). But then why can't things like space sound effects (which add impact) and visible lasers (which make it easier to see what is happening) also be considered cinematic conventions? It all seems a bit arbitrary to me.