Comment by afro88

This is totally unfeasible unfortunately. Either you support running the VM on the stick inside the host device's OS (supporting every major OS), without requiring root access nor installing anything. Or you boot from the stick and include display, keyboard and mouse/trackpad/touch drivers for every potential device you're going to plug it into. And for your last option (TV/monitor using phone/tablet IO) you'll also need an app for Android, iOS, Windows Mobile etc.