What does the ASRock DeskMini X300 update?

The DeskMini X300 updates the DisplayPort from version 1.2 to 1.4, enabling higher refresh rates at 4K and HDR support. Everything else stays the same: HDMI 2.0, VGA, USB 3.2 Gen1 ports, Gigabit Ethernet, and DC power. The front USB-C is still Gen1 (5Gbps), not Gen2, which is a bit surprising for a mid-cycle refresh.