Avatar feels like the least impactful movie on popular culture or movie discourse relative to its size, considering it was the highest grossing film ever made for about a decade. I've never met anyone who is anything but ambivalent towards it, it's rarely mentioned when discussing influential sci fi movies, and the 3D revolution it was expected to kick-start never made it off the ground. There are movies that are talked about less, but none that received this level of early conversation or box office success.