VR pixel density is arguably on an exponential curve. Most headsets are within one tripling of "human eye resolution".[1] A few are within one doubling.
“Arguably” seems right. It’s definitely not obvious from the data points in that chart…
As noted elsewhere in this discussion, the Nreal Air glasses already offer 49ppd, which is way higher than the VR headsets on that chart. I haven't gotten to try them out yet, but they seem interesting.
The Varjo XR-3 has a PPD over 70. Sadly locked behind a subscription pricing model.