In modern times, everyone carries a powerful computer in their pocket. Smart phone technology gives your eyes and fingers an easy way to manipulate data. This intuitive interface is not restricted to your smart phone. Touch screen displays are also available for your own embedded creations. A touchscreen and display allows the device to be controlled and used without a PC interface.
If your prototype needs to communicate over Ethernet, adding a serial to Ethernet server is a quick low-cost solution. There’s a good chance that your Arduino has a spare TX UART pin, so why not put it to good use?