picos 4 passthrough is not the best but it is way better than the black-white ^^
you gonna do nothing wrong when go for the pico 4 and soon there will be even more better passthrough for consumers and good price probably..
i just tried virtamate in passthrough mode and it is not bad.
with ALVR or ALXR you can now go passthrough on pico 4 and i already experiment with flat porn and that works good too...
there 2 blend modes which you can active by press hold left menu button + press A or B.
after get some clip, image or start app like virtamate with black background...
rly easy and simple to use.
its a shame that app like virtual desktop still can't do this...
i always wish to use virtual desktop in passthrough (even then when still had quest 2) but it looks like that never gonna happen.