There is a difference between covering a song and remaking a movie. There is a performance aspect of music (and theatre) that allows the same thing to be performed by multiple different people without it getting old. Movies are different and you really should make sure there is some quality about the remake that sets it apart from the original artistically. I don't have a problem with re-imagining older movies for a younger generation, assuming the older version would look dated. I am not so keen on remaking foreign language films a couple of years later for the English-speaking world because that can seem a little disrespectful to the original actors/writers etc.