3D Blu-ray's are still being released, with A-list titles like 'Doctor Strange' and 'Moana' due out this month and March, respectively. There's obviously still a sizable enough market out there for studios. I've imported 3D discs only released in Europe (Amazon UK, FR, DE) or India (via an eBay seller), where there seem to be more demand.
Like I said before, and @
wrxtasy echoed, 3D is best enjoyed on a big screen anyway... as @
tfulks has opted to. Hopefully, 3D PJ's, along w/the established base of 3D displays out there, will keep 3D Blu-ray's alive. It looks like Optoma's upcoming 4K 'budget' PJ will include 3D, something I hope other major PJ manufacturers also do (BenQ, Epson, etc.).
If 3D discs do die, I plan on enjoying my collection for as long as possible
. Have nearly 300 titles now, since the format's introduction.