My vigil has been long and lonely, but finally there's a VR backback that can be acquired for cold hard cash. MSI's VR One PC-as-a-backpack, announced back in May and refined in September, just went up for sale on Newegg. The PC, which includes an Nvidia GeForce GTX 1060 card, a 2.7GHz Core i7 processor, 256GB SSD, and 16GB of RAM, has a November 30th ship date and costs $1,999.
Dual, hot-swappable batteries (and, of course, the backpack straps) make the machine portable, though obviously you'll need something like the HTC Vive to live the truly untethered room-scale VR life you were always promised. If you have an extra $300 to spend, a GTX 1070 version with a 512GB SSD for $2,299 is also available, with the same ship date.