I'm not a big fan of 3D in movies, the only exception to that (for me) has been Avatar. I prefer traditional movie looks in horror. I can't help but place the idea of Aliens in this instance, when the Marines first head into the cocooned area of the complex... if that had been in 3D/green screen, it would not have been anywhere near as impressive.
Dunno... I am mostly a creature of habit so maybe I am not giving it its fair shake... but if this turns out to be true I can't help but be disheartened in some fashion. Certainly no where near enough to even consider not seeing it... but still, such things just don't look as good as a well designed and made traditional set.