HP's new '4K Envy' monitor comes with USB-C - FlatpanelsHD
LCD monitor with USB-C Dock 329P9H/27 | Philips
Amazon.com: Dell UltraSharp U2720Q 27 Inch 4K UHD (3840 x 2160) LED Backlit LCD IPS USB-C Monitor (7GZ651) : Everything Else
LG 27BK85U-W: 27'' HDR10 IPS UHD 4K Monitor (3840x2160) with USB Type-C™, HDCP 2.2 Compatible, MAXXAUDIO, Acrline Stand & 3-Side Virtually Borderless Display | LG USA Business