The speaker world is anything but conservative. Think of the different types you can buy: good ol' cones 'n' domes, electrostatics, planar magnetics, ribbons, horns, pulsating spheres, and more, mounted in all sorts of enclosures or in no enclosures at all.
The world of custom home theater is less daring. Installers want speaker systems that sound great, play loud as hell for hours on end, place reasonable demands on amplifiers, and install easily. This is why you rarely see anything but cone 'n' dome speakers used in custom home theaters.
Of the companies catering to the custom market, BG Radia is one of the few that does things differently.