I'm counting all devices here, not just PCs.
I was replying to Sable Drakon, who said, "But DisplayPort and Thunderbolt aren't in common deployment on PCs ..." in response to someone who said that "display port and thunderbolt are already widely deployed." DisplayPort is widely deployed on PCs, and anyone who doesn't have DP but wants this computer monitor (see headline, "4K Computer Monitors Are Coming (But Still Pricey)") can easily get DP. If someone wants 4K for their home theater, they'll have to deal with the HDMI limitations for now, but that's not what we're talking about here--we're talking about computers.