Prices seem to have stabilized and it has been a while since I have seen a price decline. Anticipated increasing production volumes may not occur as one might imagine. For example, the relatively short life of incandescents required a steady flow of replacements, keeping the manufacturers busy. The longer life of the LEDs will mean much longer time spans between replacements.
Supplying initial demand for LEDs, which may still describe present sales volume, may have been moderately high. But once the "pipeline" is filled, the sales volume may drop.
My wife says we have more lamps on the shelf than most stores. Probably a lifetime supply of incandescents, a double-lifetime supply of CFL-- most of which were feebies from the power companies. And I now have LEDs in most of the locations on my premises where I consider them to be the best choice. So I will not be buying very many more LEDs even though I like them.
Those are my musings.