What's the absolute best movie remake of all time?S

Remakes are like leftovers — sort of warmed over and not as juicy as the original. But every now and then, someone manages to remake a classic movie, and actually bring something new and wonderful to the table. What's the best remake of a science fiction or fantasy movie?

Please include a picture or clip of your chosen film. And give us the title and date, and maybe a sentence (or haiku) about why it rocks. Thanks!