Next office version is announced by Microsoft. New Office 2019 is expected to contain Office apps like Word, Excel, PowerPoint as well as products like Exchange, SharePoint and Skype for Business.
Previews expected to start shipping mid-year 2018, final release may be late 2018. SharePoint Server 2019 on-premises version will be based on the foundational release of SharePoint Server 2016. Bring closer to cloud will be the primary goal.
Expectation from SharePoint Server 2019 on-premises:
Next Generation OneDrive Sync Client, no support for SharePoint 2016, PowerApps integration, Team News and Communication sites, but no Hub Sites, Modern UI, InfoPath is still supported