The monitor is currently being previewed, so it could be a while before it hits retail. Aside from the 4K resolution and 144Hz refresh rate, this monitor stand apart from the pack thanks to Display Stream Compression technology, which is allows Ultra HD video streams across a single interface. This technology means that you can run at 4K/144Hz without chroma subsampling, which was an issue found with the very first 4K/144Hz monitors to hit the market. It also means all of this can be done over a single DisplayPort 1.4 connection, rather than needing two.
Finally a DisplayHDR 1000 FreeSync Monitor! Hopefully more of these are released.
The XG438Q was announced at CES in January and here we are in June with basically no new information. I think Asus showed it at Computex recently but no new details.
Maybe they changed the specifications or this is an entirely different display.
It was shown at computex but got zero coverage for some reason i know because i was looking for more information on it release date window, all i found was this Post looks like the revised the stand abit tho for the CES 2019 showings of it.
DSC is part of DP specs, probably part of HDMI or the 2.1 too. So... nothing new really, just buying a better made input board from some partner instead of a board that didn't support DSC because I guess DSC was still optional in DP1.4.
DSC should have been on the 4k 144Hz monitors from get go, no stupid chroma subsampling. Lossless video compression isn't exactly new. So use it, as long as latency is kept minimal otherwise at least give us an option to disable the laggy compression.