> You haven't said why one should. The screen is 2d, the LRUD interface is 2d. It's simple and works well. What are we leaving on the table? Gestural input wit

> You haven't said why one should. The screen is 2d, the LRUD interface is 2d. It's simple and works well. What are we leaving on the table? Gestural input with a touch interface can give you a wider range of interesting UI and interaction.