Last week at Ignite the Office team announced the availability of the Office 2016 Preview, which you can read about here http://blogs.office.com/2015/05/04/office-2016-public-preview-now-available/. You can get details on how to obtain the preview here - https://products.office.com/en-us/office-2016-preview
Combine this information with the latest version of the Office OPK, v15.4 and you have the ability to see how new deployments will work.
Use the tools, product files, and documentation in the Microsoft Office Single Image v15.4 OEM Preinstallation Kit (OPK) to preload Office 2013 on new PCs for distribution to end users. The OPK enables activations of Office 2016 when this version reaches General Availability.
You can download the latest OPK here
You can download the latest OPK Guide here
Some important public Office 2016 resources can be found at...
Office 365 Community Forum – Office 2016 Preview – http://community.office365.com/en-us/office_2016_preview/f/default.aspx
MS Answers – Office 2016 Consumer focused forums – http://answers.microsoft.com/lang/office/forum/office_2016_preview
Wiki in the Office 365 Community – This Wiki hosts known issues for Office 2016 Preview - http://community.office365.com/en-us/office_2016_preview/w/issues/default.aspx