Another 4K, 144 Hz, HDR display has showed up for pre-order. This time it is the Acer Predator X27 bmiiphzx, which has been listed on Newegg for $1999.99. This display boasts specifications of a 4K (3840 x 2160) AHVA IPS panel with 178°/178° horizontal/vertical viewing angles, a response time of 4 ms, and a refresh rate up to 144 Hz through overclocking (120 Hz normal).
Since this is an HDR monitor it is capable of reaching 1000 nits brightness. So you have full 10-bit HDR support, 99% Adobe RGB coverage, and support for NVIDIA G-Sync. As far as connectivity goes you have a single HDMI 2.0 port, a DisplayPort 1.4, and four USB 3.0 ports. Newegg says it will start shipping the display June 1st.