Microsoft has introduced the Office 2019 preview for commercial customers. Office 2019 will only run on Windows 10 or Windows Server 2016. Office 2019 will include Word, Excel, PowerPoint, Outlook, Publisher, Access, Project, Visio, and OneNote for Windows 10. Microsoft is also planning to release the previews of Office 2019 for Mac, Exchange 2019, SharePoint 2019, Project Server 2019, and Skype for Business 2019.
For the detail of announcement can be found here.

Introducing the Office 2019 Preview for commercial customers. Learn more about the new features (already available in @Office365) and how organizations can install the preview: https://t.co/86gngpJZIohttps://t.co/AUDa4mYjWb

— Microsoft Office News (@OfficeNews) April 27, 2018

The business customers who aren’t subscribed to Office 365 Subscription can join to try out the Office 2019 here.