At first I feared maybe Embree might only be able to be used by biased render engines, but since Thea can use it I guess that proves it can be incorporated into any renderer, unbiased or biased.  So that would suggest there would be no reason it couldn't be incorporated into Luxrender (in fact I agree with the notion it is even likely that it will be incorporated into Lux, as more and more render engines incorporate it).

 

And there's already a Carrara plugin for Lux, Luxus for Carrara.  It seems to work really pretty well, the more I experiment with it and learn about how the Lux textures work, the more confident I am that I can develop a library in Carrara of luxus shaders (the plugin adds a new set of Luxus shader types to Carrara that you can select and edit in the Carrara texture room like any other Carrara shader).