Infotainment specialists Harman is developing new human machine interface technologies highlighting the possibilities to use gesture recognition in the car. Connectivity solutions mean mobile consumer appliances - such as smartphones and MP3 players - can communicate seamlessly with in-car hardware and consumers who want to use them. Controlling these and other functions, however, could lead to more distraction. Matthew Beecham talked with Hans Roth, Harman's director of technology about the innovations it is proposing to satisfy the consumer, legislator and OEM.