"Check out how Windows Phone 7.5 offers a truly smarter way to app. Metro Design that delivers a beautiful, integrated experience; Fast App Switching for quick multitasking between apps; Live Tiles that gives updates at a glance; and App Connect that connects searches to apps. Mobile app developers can take an idea to app faster and easier with developer tools are that both powerful and familiar. Build easily, build better, build now with Windows Phone 7.5."
Check out the video below: