My cheap-ish Samsung (cheap for a QHD) has an HDMI and a DisplayPort input. If I hook up a laptop to each input, both laptops think the screen is on- even the one who is not currently being displayed.

Laptops forever changed where and how we work, and as great as they are at giving us that freedom, it’s still incredibly useful to plug into a larger monitor (or two) when at my desk. As I get older ...