Does the iMac Pro have an 8-bit or 10-bit display?

The tech-specs do not go into explicit detail about the display's bit depth. It does though mention "One billion colors" and "Supports 10-bit spatial and temporal dithering."

I do know how dithering works; was extremely useful back in the days of displays with just 256 colors. Dithering would be used to mimic more colors. That was even a trick on older products such as the Apple IIgs (e.g. put a blue pixel next to a red one to get purple).

But with the iMac Pro's display, is it an 8-bit display and will always use dithering to mimic (as close as it can) a true 10-bit display? Or, is it a true 10-bit display and the notes on dithering are for when feeding the panel 8-bit images?

Note: All bit quantities mentioned above are for a single component (red, green, blue). Thus, the total bits would be 24 bits/pixel for an 8-bit panel and 30 bits/pixel for a 10-bit panel.