What happens next is once mining becomes unprofitable, everyone will start selling of their rigs. The used GPU market will be flooded and NVIDIA/AMD won't be able to sell new graphics cards. Meanwhile, good luck selling your BTC Pro motherboad, risers, and expensive mining frames on ebay because nobody is mining anymore.
A flood of people will get cheap as chips VR capable video cards. VR will have a big boost in sales. A new wave of video game playing zombies take over the world (from home). Delivery pizza sales go through the roof.
No reason you can't use the BTC motherboard for a PC. The H110 is very up to date with DDR4, LGA1151, ATX standard size. Stick a 3.5Ghz+ i5 or i7 in there with one of your GPU's and you have a hell of a PC.
Risers look good as Christmas tree decorations. A yearly reminder of the fun you had.
Rig Frames - well that's why I bought IKEA shelving (this one
http://www.ikea.com/ca/en/catalog/products/20213312/). Multi level, used thick wire goinng horizontal across the back and front, about 2" from the top of a shelf, attached the GPU's to the wire with zip ties. PSU and motherboard underneath. A rig on each shelf and save on the price of the overpriced rig frames. And you have a nice shelving unit after.