The same thing has been said last year, and the year before that. I think there are some indicators that the climax has been past, but that the ukulele is still very popular.
My subjective impression is that there is a little less traffic here on UU than there was a couple of years ago, and that some ukes which would have sold within minutes or hours now take several days or weeks until they're gone, both on the used market and new. But they still sell. I don't think we're at a point where luthiers will lower their prices. With a wait list of several months or years for some of the most wanted ones, perhaps their wait will get a little shorter, but there still seems to be high demand.
If you have followed NAMM over the past decade, you've seen a lot of new brands coming up and disappearing. Possibly, this goldrush era where everybody tried to enter the market is over. But there are some brands which are pretty firmly established by now and will continue to supply the market on all levels.
Last but not least, a lot of highend ukes seem to sell to Asia. I assume there is still a growing market that we know very little about.