By now, you have probably used a touchscreen keyboard. We've come a long way from the clumsy "kiosk" computers that brought touchscreen keyboards to mainstream, a decade or two ago. But a classic keyboard with physical keys is still preferable for the tactile feedback we get from pressing the keys. Until touchscreens can provide that, we'll be using traditional keyboards for a while. But how do touchscreen keyboards differ from physical keyboards, and what ideas could we copy from them to improv...