It appears the Xbox logo has undergone a slight cosmetic change in lieu of today's next-gen Xbox reveal. Whether or not the change actually has anything to do with the new Xbox remains to be seen, but you can clearly see the differences in appearance below.
The most noticeable difference is the change in the Xbox coloring. Although the actual font is the same, the coloring is now a darker green. And the sheen on the sphere with the X has been removed. It also appears the X on the sphere is darker and a bit wider.
Game Informer put together a side-by-side comparison of both the old and new logo which you can see below. Heading over to Xbox.com, it now appears the logo is back to the original, so I'm not too sure what to make of it. As the site pointed out, the new logo seems to match that of which was on the invitations for today's event, so perhaps the slight redesign has to do with the new Xbox. We can only assume… and wait until the official unveiling at 10:00am PDT.
But until then, which do you prefer: old or new Xbox logo?