Ask HN: Does the following system exist?

I want to have a laptop that runs as a hypervisor. I want to be able to run VMs on the hypervisor and be able to fast-switch desktops between these VMs. Basically hitting CTRL+ALT+F2 to switch to a windows VM - where the screen and KB are available to it, and CTRL+ALT+F3 to get to, say a linux VM.

Obviously - there are some HW changes that need to occur... but is there a machine/method for doing this?

I dont want t run a full OS with KVM/VirtBox where I run a VM in a window.

Suggestions?