alt Hacker NewsKVMs are for rebooting and recovering servers without needing physical access. Maybe you would have some chance with HDMI splitter connected with an EDID dummy plug and an HDMI-Ethernet capture encoder thing, and some dedicated KVM for just keyboard and mouse, but idk.
For me, I want to access my physical desktop without having to keep a physically separate monitor and keyboard than my MacBook. I have the physically separate monitor and keyboard, and I actually kept it co-located with my laptop for the longest time, but it's just more convenient to not have to swap it out with the laptop to maintain good posture, etc. (I use the laptop in bed due to chronic pain/disability)