More than two out of three PCs today are mobile devices - laptop, netbooks, notebooks, tablets, and slates. Nearly every PC is capable of wireless connectivity. Screens range from under ten inches to wall-mounted monitors to multiple HD screens. Storage has grown from megabytes to terabytes and is moving to the cloud. Multi-core processing and powerful graphics are normal. Touch screen mobile phones with the rich capabilities they bring together have changed the way we view computing. The explosion of social technologies, cloud-based services, and access to the web services through apps give people powerful new ways to connect and share. Modern computing focuses much more on people and apps than on the operating system. These changes in the landscape motivated the most significant changes to Windows.