The new tag line was first officially shown in a video which also emphasises how flexibility exists between the various brands from Microsoft and partners. Some assumed that the ribbon icons within the video indicated that Microsoft was about to announce a brand new set of logos for its products. This new logo helps microsoft to market their products quite effectively and getting more visiblity amongst people.
You can also check out the new look of Microsoft Logo with its Motto label. Its looking great and quite catching.