> You can buy an HTC Vive for 800$, and a PI4 for 60$.
Why would anyone use Dropbox?? You can just use SFTP, CVS and a 5$ VPS... [0]
Seriously though, let's treat your comment as non-trolling:
The HTC Vive - a 6-year-old device - does not have anything close to the per-eye resolution needed to do any kind of desktop computing, AND it uses outside-in tracking, meaning you need external lighthouses so it's not really portable.
You would have been better off saying "You can buy an Oculus Quest 2 for $629" instead.
The PI4 does not provide the computing power to drive a VR display like that. That's kind of it right there. Bad example again.