Fwiw, we started by streaming Windows and pivoted away.
It's not clear to me that Shadow's business is sustainable. Windows licensing alone for virtualization across end-users if you buy from a reseller is $11/mo/user alone. I only know because we tried and became a reseller briefly. They also seem to use consumer GPUs that violate NVIDIA's licensing and agreements. Maybe they know something we don't.
They claim to, in reality they are sliced Quadro/Tesla cards that get a GTX 1080's worth of performance. I was wondering about the Windows licensing myself, not clear how they got around that.
In any case, even at $20 p/m it feels like a strong value. That ~$1000 every four years - without ever being stuck with an out of date machine.