Why are hi-end active monitors not more popular?

I was just curious why more home systems don't utilize active monitors from hi-end manufacturers. Dynaudio, Focal, PMC and Genelec to name a few seem to have very high value offerings that, on the surface, appear taylor made for a simple system. Just add a cd player with volume and balanced outs or a hi-end dac connected to a music server. Pros and cons are appreciated. A home consumer version seems to have already made it to market in the NHT XDs system. I haven't heard the NHT system and would appreciate your comments.