How to promote active speakers in general is an interesting question.
Form my experience in industry automated noise testing was promoted long before the technology was fully capable. This led to false passes, disappointment and a retraction in the rate adoption. Twenty years later it is more capable than the human it replaced. We can see the same typical history in CD and multichannel audio. Media always seems to over sell a fledgling technology and claim a mainstream adoption time line not based in reality.
Active crossover is not a new idea, but perhaps the technology has finally matured enough to supplant the existing technology. This will not happen overnight, but it will absolutly happen in the next decade. JBL, Legacy, Sanders, Martin Logan, Emerald Physics and many, many others all have active systems. Now Bryston. The slow march has started and it is not going to stop.
I am willing to bet inexpensive Class D amplification will ultimately drive mainstream active crossover as I can foresee the hybrid DSP processors performing both D/A, Xover and even FET/IGBT Switching tasks some day soon. I am reasonably certain it already exists high end in car audio.
Another first adopter will be small bookshelf / 7.1 active speaker systems where high volume and low cost will drive research and further sound optimization. With long through drivers and DSP equalization these small systems are making very impressive sound! Young people simply do not have the living space for the traditional "big is better" speaker design solution.
My simplistic suggestion is to "mandate/loan" each authorized Bryston dealer to setup a modest active demo and let the customers decide. Not all prospective customers will have the money to purchase active but they may aspire to in the future. The word will get out, that you can be sure of.