There's already a mostly-working open source SLAM implementation that people have been using on a few of the existing headsets. What complicates matters here is

There's already a mostly-working open source SLAM implementation that people have been using on a few of the existing headsets. What complicates matters here is that at least feature extraction seems to run on the PSVR2 headset itself so the existing code can't just be dropped in as-is. (Also, whilst the controllers work in basically the same way as many other VR controllers using a constellation of IR LEDs, there's not really good open source support for any of those controllers either.)