As they say,Change is Inevitable.Over the Past 25 years the only constant in the Software Giant was the Microsoft Logo,with the changes coming to the operating system from the earlier versions of Windows In terms of UI and other Features and a lots of other brilliant ideas like Office suite,Visual Studio,Windows Mobile and then Windows Phone!

Image Credits[Microsoft]
So after 25 years Microsoft decided to change their conventional Wavy Logo with a touch of “Modern UI“,with ”Microsoft” written in the Segoe font while the symbol’s squares of color are intended to express the company’s diverse portfolio of products.This logo will now be prominently used.
As we speak the logo is already in use at 3 of the Microsoft Retail Store’s across Boston, Seattle’s University Village and Bellevue, Wash and will be up and running in all the remaining stores in coming months.It can also be spotted in the upcoming TV commercials for Microsoft Products.
There is a flurry of new releases for Microsoft with Windows 8/RT,Windows Phone 8,new Xbox Services,Office suite and the Surface Tablets are expected in a matter of weeks from now,so it was just about the right time for the unveiling of new logo.
Source:[Official Microsoft Blog]