Windows Phone 7 introduced a new "Metro" interface that focused on the end user experience. It featured a 1 GHz processor, multi-touch screen, sensors like accelerometers and GPS, and the ability to develop applications using Silverlight or XNA. The Windows Phone marketplace allowed developers to distribute apps and games through a centralized storefront. Overall, Windows Phone 7 marked a significant change from older Windows Mobile platforms and aimed to make the user interface and development experience more cohesive.