It's visually stunning but there is no substance. Cameron may have been able to pull this trick once when the technology had never been seen before but the CGI although impressive is not as ground breaking as it was 13 years ago. People are over 3d now. It's a one trick pony, a decade too late. Like with the first, a movie that comes in near 3 hours needs more than great CGI to sustain it. Without any kind of engaging plot it's three hour run time feels like an eternity.

Why doesn't plot seem to matter to anyone anymore? Are we really so dumbed down as a society?

Movie's that cost so much really need more to make it. After the initial buzz, I suspect viewings will crash and nobody will care in a very short period of time.