Eric Overfield presented on the design dilemma of building mobile and SharePoint interfaces. He discussed how accessing the web has changed with the proliferation of different devices like phones, tablets, and televisions. These devices have varying screen sizes, functionality, and usability which makes designing interfaces that work across all of them challenging. Overfield presented different options for SharePoint like device-specific interfaces, progressive enhancement, and responsive web design. He concluded by discussing how SharePoint 2013's new device channels feature could help but responsive design remains the best approach to build interfaces that adapt to any device.