Windows 9 lays its elements firmly on a space that is natural to use in an environment of 2D display and input. While this space is proudly digital, it feels authentic and does not conflict with the way humans expect natural objects to act.

Touch, mouse + keyboard and other input methods do not require a fundamentally different UI structure. While touch input requires large hit targets, for example, cursor-based interaction benefits from them as well. On Windows 9, apps can easily optimize their interface for the user based on detected input device.