SciFi and fantasy production via CG now on the next level and hopefully a sign to come. I would certainly pay/wait the extra amount to get in to an IMAX 3D, even though you'll eventually see this on DVD/cable - but it won't be the same.
The under-tones are certainly on the 'Michael Moore'-level of disgust with American capitalism and 'soldiers are baby-killers.' If you're a multi-cultural/vegitarian/anti-war/drug-addict/pro-union/athiest, you'll LOVE LOVE LOVE this! Otherwise, get past the social issues and enjoy a premium movie experience!