On: Apple iMac M4 review: who is this for, exactly?

[jmpman]

I wish they still had target display mode. Then I could connect my work laptop to a “home” iMac. Was a good setup when I could use my iMac as a gaming computer back in the x86 days.

[bookstore-romeo → jmpman]

While not as versatile as Target Display Mode, you can use AirPlay over a wired connection from Mac to Mac: https://www.macrumors.com/2021/06/09/airplay-mac-to-mac-exte... Weird it's still called AirPlay, but at least it's possible. The video will be compressed, though unlike Target Display Mode

[jdiff → jmpman]

AirPlay certainly isn't as snappy as a physical connection but it's not bad for just a secondary monitor with secondary materials on it.