If you have connected your Xbox One console to your TV via HDMI cable, disconnect it and then turn off your TV. Wait for a few minutes and then turn your TV on. Now, connect the HDMI cable and check ...
I have a 4K monitor that supports 4K 60Hz, but sadly, only on DisplayPort. This monitor was from when a simple office productivity 4K monitor was still >$1000, hence the limitation. I don't think ...