It would be nice to eliminate mouse and keyboard inputs and as such eliminate the asepsis issues associated with these devices by using a touch screen. Fabulously successful tablets, like the iPad, have made touchscreens popular. The new Microsoft OS Windows 10 is designed specifically to work with touchscreens. (Sadly far too many dental applications have not been optimized for Widows 10). This seems like an elegant solution but in practice it is problematic and pricey. The user has to be sitting in front of the touch screen monitor. Fine mouse type movements are very difficult. When keyboard input is needed the only option is an on-screen keyboard which is awkward to use.
Finally, after all that the user still needs to touch the screen so there is still an asepsis issue. Spraying and wiping a touch screen is no more desirable than spraying the keyboard.