Its a neat idea but should have stayed as some designers concept fantasy. It'll sound terrible and not give you very good illumination. Also as you said, it is ludicrously expensive for just 1 bulb which still requires the base station.

I don't expect it to last long before breaking either from the heat given off by the electronics and LED together with the enclosure that these bulbs are generally fitted in.

Relevant quotes for this are "eventually pays for itself" as you save money on bulb changes, energy, and installation costs." and "LightSpeakers are for background music and not intended to replace home theater speakers,".