bumping up - I'm hoping something has changed or this gets some traction.
My old Dell monitor worked with ClickMonitorDDC which made it possible to switch between inputs with keyboard shortcuts. The app seems to pick up on other settings on the Asus monitor but not input. Given that, I would imagine that this is addressable via a firmware yodate.
KVM is not an option. Why would you have to pay for hardware that requires adding a ton more cables to handle something that software should be able to handle pretty easily if the support is there. There is also software (does requires purchasing) that allows for using mouse and keyboard on other devices via network connection.