FYI, the 8K is their Input Resolution.
That resolution is then divided into the 45 viewing directions: https://docs.lookingglassfactory.com/Appendix/how-it-works/
We need to divide 7680x4320 by the 9x5 grid.
Thus, the effective resolution is only 864x853 scaled in width to make each pixel about 1.75x wider than tall.
At that resolution, it might be difficult to read normal-sized text.