There are so many explanation about the purpose of this change. Like; "There are so many tech devices in our life right now and the logo (mean the old one) were not fitting for everyone of them. For example mobile devices."
It's not wrong. But maybe the real reason is; the desire of the simplicity in our lives. Inventions, tech improvements, fiber optics, unlimited news sources and with the all the other marvelous things, as a person, we're feeling that like we're trying to sit and relax in the middle of the international highway, or trying to sleep in the middle of the rock concert crowd. In this fast life rhythm, we're barely catching the life. So we began to need a break. Otherwise, we wont be happy or satisfy.
Now, we are seeking to simplicity in our lifes and its desire will be kept growing. The change of the logo of the one of the most powerful company of the mother earth may be the one of the reflections of that desire.