Limbo is a front-end for QEMU, an open-source machine emulator and virtualizer. Unlike virtualization (like VMware), which shares host resources, QEMU emulates entire hardware systems (CPU, motherboard, graphics card) in software.
Is it practical? Is it cool that my phone can boot a 2009 operating system from a disk image? Absolutely. Windows 7 Iso Limbo Pc Emulator
Here is what happens next: