Here are a few headlines of some new features that will coming soon (or were just recently added) to Office 365:

• Shared Channels, Polling app, Pop-Out shared content, and Video Clip in Teams: Check out the new features rolling out to Teams including Excel Live.
• Embedded Images in Excel: You can soon use a new “IMAGE” function in Excel to pull images from online sources. See Microsoft’s announcement and description here as well as Office Watch’s review (and wishlist) of the IMAGE function.
• Build your own Toolbar in Office: We couldn’t find a Microsoft article stating that this was a coming feature yet, but Office Watch is playing with the latest Office builds and is seeing the ability to create your own toolbar (this is different than customizing the quick access bar).