iPads have continued to advance and take market share while other options seem to die off due to lack of public interest.
ipad market share is around 30%, and that with Google and Samsung doing their best to ignore this market:
https://www.idc.com/getdoc.jsp?containerId=prUS47648021
(Funny thing, "iPad" is autocorrected to "I pad" on my tablet, I think Samsung is playing dirty tricks)
These two reports measure different things (I assume it's something like actual sales vs web traffic) but they are not that far apart: 31.6% vs 36.5% market share for ipad.
But I guess it's clear, the iFoldPhones will sell a lot more units than the Samsung ones and Samsung will still earn that supplier money, and when Apple announces it, it'll be advertisement for Samsung's own fold phones for people who prefer Android.
The division that manufactures the displays wants them to be as ubiquitous as possible, since they're looking to sell as many screens as they can.
The Galaxy Z line just went from "expensive gimmick" to "the future of phones"