Microsoft has announced availability of the public preview version of Office 2016:

http://blogs.office.com/2015/05/04/office-2016-public-preview-now-available/

Since March, we’ve shared some glimpses of what’s to come in Office 2016. Today, we’d like to give a more holistic view of what customers at home and work can expect in the next release. In Office 2016, we’re updating the Office suite for the modern workplace, with smart tools for individuals, teams, and businesses.

Your documents, anywhere — Across the Office 2016 applications, it’s easier to use the power of feature-rich applications to create, open, edit and save files in the cloud from your desktop, so you can access them from anywhere and on any device. In addition, new modern attachments in Outlook make it easy to attach files from OneDrive and automatically configure permission for the recipients—without leaving Outlook. All making it easier to share and collaborate on your work with others.

Collaboration — Real-time co-authoring is available in the Office Online apps today and we’re bringing that experience to the Windows Desktop applications, starting with Word. When you and your team are working in Word 2016 and/or Office online, you’ll be able to see where other editors are working and what they are writing—all in real-time.

Smart Applications — Applications will learn as you work, taking advantage of subtle cues and clues to help you stay on task and get more out of Office. Tell Me, a new search tool available in Word, PowerPoint, and Excel, serves up the commands you need by simply typing what you want to do.

Data analysis made faster and easier — New analysis capabilities are built into Excel, so you can pull, map, analyze and visualize your data faster and easier than ever.

New for IT – Office 2016 will offer new security, compliance, and deployment features, giving organizations more control over sensitive data and IT more flexibility in deployment and management.