I see what you guys are saying, but keep in mind that Lux is in no way, shape, or form a "make art" button :)
Essentially it's a physically-based rendering engine; meaning that it treats lights as wavelengths and all kinds of other crazy stuff. Shaders are also based on real-world physics as well.
I'll definitely use it for some architectural work, but that's about it for now.
Some of the big studios are transitioning to these unbiased engines as we speak, but keep in mind they have the hardware to make them practical.
Interestingly, films like Cloudy With a Chance of Meatballs, 2012, and the fourth Shrek are (mostly) rendered with physically-based engines.
Avatar on the other hand was done the old-fashioned way and it looks a million times better...
Still, having this option is essential for Carrara's future. If it happens, the plug-in will export everything including hair and particles over to Lux; cool beans!
This is looking more and more like a moot point though; the survey isn't going anywhere...