Here are the requirements listed by Microsoft so far:

One of these new GPUs or CPUs with the latest drivers:
11th Gen Intel Core Tiger Lake processors with Intel Iris Xe Graphics
NVIDIA GeForce RTX 30 Series GPUs
AMD Radeon RX 6000 Series Graphics (coming soon)
Windows 10 build 1909 (aka November 2019 update) or later
Microsoft AV1 Video Extension
A web browser or other application with hardware acceleration support for AV1