It’s been 25 years since Microsoft updated its logo and now is the perfect time for a change. This is an incredibly exciting year for Microsoft as we prepare to release new versions of nearly all of our products. From Windows 8 to Windows Phone 8 to Xbox services to the next version of Office, you will see a common look and feel across these products providing a familiar and seamless experience on PCs, phones, tablets and TVs.
The logo has two components: the logotype and the symbol. For the logotype, Microsoft uses the Segoe font which is the same font for their marketing communications. The symbol’s squares of color are intended to express the company’s diverse portfolio of products. The symbol is important in a world of digital motion. In that dimension, the symbol represents Windows8 new Tile based User Interface (UI).
It reflects Microsoft's branding milestone towards Windows8 product suit releases.