Windows Phone 7, a Standardized Platform

Windows Phone 7 brings all the advantages of a standardized
platform and a consistent developer experience to the Microsoft
platform for devices from many different manufacturers. It is not a
replacement for Windows Mobile, which continues to provide a powerful
platform for a wide range of devices and application scenarios.
Instead, Windows Phone 7 is a brand new mobile device that incorporates
a comprehensive set of features necessary to build applications
that satisfy the needs of business and consumers, to allow developers
to easily create powerful interactive and attractive applications, and
to reuse their skills and knowledge of existing modern development
environments, such as the Microsoft Silverlight® and the Microsoft
XNA® development platforms.

Windows Phone 7 incorporates the majority of features that users
now expect to find on a mobile device, such as cloud service and
media integration, easy and safe application installation, a stylish
modern user interface (UI) that supports gestures and smooth animation,
and device capabilities, such as location awareness, camera,
sound recording, messaging, and multi-touch. Figure 1 shows the main
features of a Windows Phone 7 device.