Best Presentation Switchers for conference rooms

The measure of a meeting-room switcher is what happens when a visitor plugs in an unfamiliar laptop and nobody from AV is in the building. It should detect the new source, take it, and put the room camera and microphone back to that machine over the same connector, without a menu.

Most of the failures here are handshake failures rather than hardware ones. A display that reports the wrong capabilities, or a splitter that mangles them, produces a black screen the user reads as a broken room. Fixed capability handling and a switcher that reconnects on its own are worth more than any extra input across an estate of identical rooms.