Avatar is a Masterpiece
Avatar had great visuals, great performances, likable characters and solid story.
I love it even after all these years.
Who else loves Avatar?
I wouldn't call it a masterpiece, but I enjoyed it and still do, enough to buy the extended edition which I also liked. It was revolutionary in terms of mo-cap technology, so it deserves credit for that as many people use it now, especially in video games. Watching it in IMAX 3D was certainly an experience that can't be replicated or substituted on a TV, but the movie itself is still good enough for me that I can watch it again without it.
It's not original in terms of the plot, but practically every type of story has been done to death anyway so it all comes down to whether people can tell the same story again in a way that's still fun, engaging, and exciting.