While my review of the new Dune flick was less than glowing, Dune: Didn't Hate It, Big Country Expat watched it on IMAX and really enjoyed it: Color Me HIGHLY Impressed
I suspected that it suffered a lot by watching it on a computer screen, even a 32" curved HD monitor and BCE's review reinforces that thought. I still won't shell out even a buck to see it but if you are going to, IMAX sounds like it is worth the entra shekels.
Something else he said, he has read the book and knows the plot line while when I watched it my wife didn't so I had to keep explaining what was going on. It definitely is a movie best enjoyed by people who know the story going in.