Can you elaborate? You seem to be saying that the HDMI or VGA socket in a laptop can also act as an input instead of just an output? That intrigues me, though I

Can you elaborate? You seem to be saying that the HDMI or VGA socket in a laptop can also act as an input instead of just an output? That intrigues me, though I'd also be really surprised if it were the case. You could potentially use one of those wireless display technologies (Miracast, I think it's called) and setup the computer as a sink, but the software seemed far from usable when I tried that a year ago.