In light of the forced transitions from Hotmail to Outlook.com by Microsoft, the Bing search navigation bar has also been slightly updated.
For those that use Bing, you might know that on the navbar there is a link to Hotmail...which is now being ditched by Microsoft for their newest email service. The "Hotmail" link has now been changed to "Outlook.com". I'm not quite sure if this change is rolling out to everyone, or a change that was effective immediately.
Below is a picture of the updated Bing navbar. Mine is slightly different because I am signed in, and have a lot of Bing search credits from Bing rewards. The image is a bit small, so I recommend clicking the image to enlarge it.