Well, I think you're on the right track. Right behind me are 30 supermicro pizzboxes (some have GPUs) that are racked but powered down and looking very lonely (but with 6 dark fibers also feeling lonely at the moment). Perhaps I'd consider an "encoding.com for VR". Honestly, the main part I'm missing is real-time stitching, but maybe Facebook's open source release for their Surround 360 software later this summer will solve that!