While I was unemployed I almost launched a Kickstarter to build it, but I figured not enough people were interested. I think a runnable prototype could be done

While I was unemployed I almost launched a Kickstarter to build it, but I figured not enough people were interested. I think a runnable prototype could be done by a couple of people in a year if you focused on a very tight hardware subset, say Raspberry Pi 3 and VirtualBox x86.