Well I think it would work well for the touch capacitive buttons as the home button has no long press function as of 8.1. As far as phones with on screen keys go, it should work the same. Cortana is mapped to the search button, multitasking to the back button, it just makes sense to use the long press function for something on the home button. And it would provide quick access to the camera. I have a hardware button for the camera, but personally I think it would be easier just to hold the home TCP button.