It is also good to remember that everything started off inefficient with virtualization, it was incredibly slow and broke lots of things, but now it runs the modern web. I can run a VM on consumer grade hardware and reach most of the way to performance parity with native hardware with no technical skill past installing a few packages and running a wizard. Given the number if ARM based systems on the market now with built in battery and wireless I can imagine a lot of people wanting to repurposed then into home servers with power redundancy and remote access. The future looks bright for ARM servers