YES! Very naughty of Nvidia to force you to use their VCA appliance or GRID cards if you want powerful GPU and vGPU clusters! But I understand Nvidia has to start out that way, at least to ensure stability in production environments where Quadros and Teslas are the norm.
Lord willing they will open it up to Geforce cards as time goes by. Their IRay Server beta allows for local network cloud rendering (queued and streaming) using their beta plugins and IRay Server beta etc. Currently 3DSMax and Maya appear to have the best support for that. And it works with Geforce cards… but it’s not meant for WAN cloud or vGPU yet.
Now Nvidia Iray for Blender. That would be sweet and people would pay for that, I imagine it would be less expensive than Octane for Blender!