Microsoft published the feature list for the various editions of SQL Server 2016.
Some of the best news is that the Query Store will be included in all versions. MS also killed off the BI edition. The BI edition was always a strange edition. It sounded good, but it was missing many of the key features one would want with a BI platform - those were only included with the Enterprise Edition.
And, as we earlier have commented, the developer edition is now free (see Free SQL Server Developer Edition - insane!).
Compare Editions: Compare SQL Server 2016 SP1 editions1
( high level overview of scale, memory, cores, etc.)
You can find the full listing of supported features here: Features Supported by the Editions of SQL Server 2016.