I suspect this is due to yields being so low (as recently reported) and intentionally not wanting to drum up too much excitement for a product they don't have supply for.
There's a lot of excitement for Dell's new gaming monitor using these QD-OLED panels, essentially a TV cut in half, which is sold for $1299. At a yield of ~33% (reported figure) for a TV panel, the yield for 'half a TV' is almost 4x that. Four monitors for $5196 total rather than one TV for $2200, even after giving a third party a sizeable cut, is likely a better proposition for Samsung Displays who will prefer selling them to Dell and other partners for gaming monitors while they're stuck at low volume, until they can supply all markets without restraint.