Microsoft gave a sneak peak at the timeframe and focus areas for SharePoint Server 2016. Timeframe is general release in 2Q2016, with a beta in 4Q2015. The areas of focus are:
– improved user experiences, with mobile device and on-the-go access front and center, along with tools such as Office Graph and Delve working in some ways with on-premises SharePoint Server 2016.
– cloud-inspired infrastructure, for ways of making SharePoint on-premises perform better and more reliably through applying what Microsoft has learnt by running SharePoint in the cloud as part of Office 365.
– compliance and reporting, with data loss protection (DLP), data encryption, and compliance tools that work across data on-premises in SharePoint and in-cloud in Office 365.

If you are going to Microsoft Ignite in a couple of weeks in Chicago, there will be a lot more disclosed, discussed, and debated about SharePoint Server 2016 (and many other Microsoft tools). If you are not going, there will be some live streaming of events, and hopefully a good stream of updates through publication of slide decks, etc. One very relevant session to all organizations using SharePoint on-premises is The Evolution of SharePoint: Overview and Roadmap.