Curiosity: is anyone here developing inside a VM, with GPU passthrough, and with the monitor directly connected to the GPU used by the VM? (as in: showing the UI of the VM, without any need for RDP or the like)

Such a setup works (I'd know for I have one at home doing just that but it's not my main PC) but how's it like to work like that?

The GPU hooked to the hypervisor can either be on another monitor or on another input (in the latter case you'd "go" to the hypervisor by changing the monitor's input).