rerun119 well there are many ways to stream on your home network using heresphere. Probably the most popular is to use xbvr https://github.com/xbapps/xbvr and the heresphere quest app. You can also stream from a file server but something like xbvr will give you meta data, funscript support and a lot more.
What's also possible is just to use steam vr on your desktop as normal but use virtual desktop (the best) or steam link to connect to your pc from your quest. This is also a very good option but it is slightly less convenient and needs a strong network and good gpu.
As for the pimax, I wouldn't know. Google around I guess. Yeah, about that 12k, it was super exciting when they announced it but if and when they ever release it it wil likely be dead on arrival, oitdated. Why did they even make the crystal and that weird portal thing?