During the Windows Phone Summit, Microsoft just announced Windows Phone 7.8. They will be giving an update to the existing Windows 7.5 devices as Windows Phone 8 needs newer hardware. The update will include the new Start Screen experience which is just awesome. Live tiles will provide the user a seamless experience. Windows Phone 7.8 will also have lots of exciting features which will be revealed later.
So, Windows Phone 7.5 users be ready for Windows Phone 7.8 and a great Start screen experience.
Lots more to come.