Not really.
DCI P3 is part of 'HDR' though, and supports more colours in the spectrum, than your average TV at home.
It's still not part of HDR, but they are very frequently bundled together (to the extent I've never seen a HDR display or file delivery that used HDR that didn't also include DCI P3, though I have seen the reverse).
(Edit: Also I don't think I've explicitly said it yet but if Microsoft is shipping the slim to play back UHD Blu-ray at $299 then fair play to them, that's great, and I think it'll sell really well. Bit of a bugger I paid £430 for a standalone player last week...)