If you subscribe to Office 365, you have access to the new Mac versions right now. If not, you’ll need to wait for September for the Office applications to be released with a regular purchase license, rather than by subscription.
Here’s a screen shot of Excel 2016 for Mac:
More info and screen shots from Tech Crunch.
The best part is the app includes wrist protection, so you can rest your hand on the screen just like you do with a pad of paper. (Since this is a new feature, I haven’t put it through a lot of testing. Many apps claim to do this, but fail.) You’ll find these features in the new Draw tab of the app.
More info is on the official OneNote blog. And here’s a demo: