I am starting to think that Alyx is VR high tide point. It was either going to be the thing that makes folks and developers run to VR or just stand out there is a neat proof of concept that gets ignored. Alyx is now 2 years old, there hasnt been a rush towards the space yet...
Offload to local device with, yes. Offload to server farm elsewhere ... naaah. You have at most a few ms to compress - stream - decompress - refresh. Any latency, jitter, stutter, etc has a very negative impact in vr. Much more so than on a regular monitor.