I honestly fail to see what's so exciting about this film. Whoop-de-doo, the bar for CGI has been raised for all of about six months, or whenever the next hyped-to-fuck blockbuster comes out. Yay, it's got marines, and giant robots, and lots of guns. What I really don't get though: Pandora is supposed to be a completely alien planet, right? So why do the aliens look like blue people and (going from what's in the trailer) where the hell did they learn english? So what, they're alien enough that they can get blown to shit on screen, but they're not so alien that they've evolved an alternative to vocal chords or eyeballs or five fingers a hand?
I've noticed a lot of people saying it's really beautiful. I've not seen the whole film, so maybe I'm missing something, but it looks no different to those recent Star Wars films everyone loves to slag off so much. Lots of bright colours, beasties that look cool but would never work in real life, lots of sparkly particle effects. Again, whoop de doo. David Attenborough's got a series on the telly right now called Life. Now that's beautiful, and you can watch it for free. Or even better, rent Planet Earth and watch it on a massive TV screen. I can guarantee it's more beautiful and engrossing than whatever the concept artists at Cameron Co. are squirting out.
EDIT
Just read the plot synopsis on Wikipedia. This is what's been getting all the rave reviews? The cliches have fucking cliches. And seriously, what the hell is up with all the blue-alien romance recently? Is sex getting that boring we need to bring in extraterrestrials to spice it back up?