I need to be able to see the desktops of 4 separate PCs at the same time. Ideally I'd like to avoid using 4 monitors. A KVM won't do the trick because I need to see all 4 displays simultaneously. Is this possible with a special monitor or maybe some kind of adapter that would merge all 4 video inputs into a 2x2 grid?
Edit - the applications will be running 3d graphics so any kind of remote desktop solution would need to be able to handle a decent frame rate.