The problem: Display four computer screens on one projector.
Hardware HD video mixers with VGA inputs are too expensive and employing a minion to switch between VGA channels manually is impractical. The obvious solution to display multiple screens simultaneously or in sequence would be to use a video mixing software. But video capture cards to get the video signal into a computer have their price point as well. We all (still) have ethernet though, so VNC to the rescue.
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