Dell has now made available the previously announced UltraSharp U2723QE and U3223QE 4K monitors today. These monitors offer a host of connectivity features with a USB-C hub and support wide color gamuts and DisplayHDR 400. The Dell UltraSharp U2723QE and U3223QE are the world's monitors to feature LG's new IPS Black technology that offers a 2,000:1 contrast ratio.
https://www.notebookcheck.net/Dell-UltraSharp-27-inch-U2723QE-and-31-5-inch-U3223QE-World-s-first-IPS-Black-monitors-with-2000-1-contrast-ratio-DisplayHDR-400-and-Auto-KVM.611044.0.html