Focus on function is a critical factor in bringing compelling products to market. But when products deliver on both functional and emotional levels, doors open to more powerful experiences. Take the "Expression of Joy" theme for the launch of the 2009 BMW Z4. The company is tapping into its rich history of merging art and vehicle design. Moving beyond the “Art Cars” of the past, clever engineering allows drivers to use a Z4 to paint broad strokes as they drive on a warehouse-sized canvas, all while demonstrating the vehicle’s performance. With the new Z4 iPhone app, users can virtually paint their rich picture of the offering.