While the bandwidth enabled by VESA’s DisplayPort Alt Mode 2.0 standard will power multiple 4K displays, you’ll need to pay attention to your USB-C cables beginning next year.

Next year will see the introduction of laptops and desktops that should be able to connect to massive 16K displays running HDR across USB-C, thanks to a new DisplayPort Alt Mode 2.0 standard released by the Video Electronics Standards Association (VESA) on April 29.
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https://www.pcworld.com/article/3541811/displayport-alt-mode-20-will-let-laptops-connect-to-16k-displays-over-usb-c-in-2021.html