You can stream existing desktops/laptops to just about any mainstream headset. The issue is the software availability for the headset itself. Apple showed specifically the ios basis of this device, not the mac basis.

>There aren’t all that many use cases where having a Mac streaming wirelessly to your headset isn’t good enough.

It's not $3500 good enough. Its the same solution cheaper headsets use, and don't require full laptop hardware in the headset to do it.