I'm not aware of how to force a VM to use a physical monitor. I've no doubt it can be done, but doesn't sound fun.
I had an interest in making this work before but the rough answer is for xen hvm, kvm and esxi, it's not possible to share a physical display with the host node (or whatever is relevant based on hypervisor). KVM, I think, comes closest with some fbdev patches, but these corrupt the framebuffers of all VTs if you switch away from the VM and it continues to write. All three allow attaching a video device to a guest via pci-passthrough (vt-d) so you can put video through but that doesn't qualify as sharing. I couldn't find a way to re-init the device with the HN after the guest had finished either.
You mean if I want to use a remote VPS for GUI things I take it?
