He is using touch, that would give him an advantage over using a mouse. You can buy graphics tablets for the PC/Mac which also support touch gestures, basically

He is using touch, that would give him an advantage over using a mouse. You can buy graphics tablets for the PC/Mac which also support touch gestures, basically a graphics tablet which allows you to finger paint. The same things with touch and a screen are not cheap, the cheapest one I can think of is the iPod touch actually, and if the guy already has a smart phone which can do it, why not reuse it?