I have the MX Keys and MX Master 3 setup. Actually, the Flow feature is working with the keyboard following the mouse (when reaching the corners of the screens). But i think it would be very very nice to be able to have the mouse following the keyboard too. So i could switch computers using easy-switch buttons on MX Keys and have the MX Master 3 follow. This could be an optional setting to be activated/deactivated according to user preferences.