So this video kind of made me do three things:
1) Finally register an account here.
2) Buy Beat Saber for the second time on Steam (which I swear never goes on sale).
3) Try Beat Saber on the Quest using Virtual Desktop (Link just doesn't work on my end, even with the very same cables (passes setup, but black screen of go jump off a cliff).
Here's what I found:
1) The 'jello' feeling he's talking about... I think that's a per setup basis. I tried it in my cramped basement and it was like my hands were yo-yoing everywhere. I tried it in my open kitchen and things were buttery smooth.
2) Playing Beat Saber via Virtual Desktop (Wifi Streaming) is doable... up until Expert. At Expert, eventually the tracking just gives up and your controllers just stop responding properly. This isn't the case on the native Quest version, as my S rank on 90% of all official songs will attest to (I am not even going to think about Expert+).
3) My theory on why #2 didn't work so well is due to network traffic. My network isn't Linus level of amazing (just a basic R6220 from Netgear that is in the basement but the same area near testing above), but from what it seemed, there was something causing interference. Don't get me wrong, I'm 100% positive there is some lag, but to that level... even I had to raise an eyebrow.
That being said, I do hope this is improved, as Oculus seriously has no excuse on any control latency: just let the Quest do its job, send the data across the USB, and you're done. Once I get the Link working, I'll have to give it a try again and see how it compares, but I guess your results may vary and it really will not fully compare to say an Index, Vive, or even the Rift S... but if you want an easy way to get into VRChat, low to mid level Beat Saber, or other games and want something that can do things on its own (seriously, this thing is a like bringing a console over for a LAN party), it's still a nice buy... if you can find one for sale.
EDIT: To note, my current headset is a Vive with Index controllers. I have a DK2 and Razer Hydras, but I'm not going to set those up again unless I'm really really bored.