Probably a dumb question, I might've missed it in the description somewhere, but I assume the onboard PC is mostly to facilitate the streaming functionality, and it will stream from your main machine to the headset right?

I'm very curious about the latency if that's the case. This might be the trigger for me to get into VR finally, but I'm worried that if there's noticeable lag in the stream that I'll basically cover myself in vomit from motion sickness lol

The latency introduced by the network link will be tiny compared to most games total frame latency. I would prefer a cable link just so I don't have to worry about charging it ever, but I think the wireless link will be fine from a lag perspective.

it supports standalone, may allow sideloading apks too, sounds more powerful than quest3 and also - no lag because the 6Ghz wifi doesn't go through the router, so long as you are close to the PCVR source - it's probably lag free. how did you do?