SQL Server 2016 has significant advancements over SQL Server 2014 for In-Memory analytics. Some highlights are functionality (e.g. ability to create traditional nonclustered index to enforce PK/FK), performance (e.g. addition of new BatchMode operators, Aggregate pushdown), Online index defragmentation, and supportability (e.g. new DMVs, Perfmon counters and XEvents).
His post talks a little bit about in-memory, but focuses more on clustered columnstore indexes. I like that columnstore indexes are getting V3 improvements, and I think they’ll be even more useful. Whether the “in-memory” part becomes useful is a different question; I personally have seen a very limited adoption of In-Memory OLTP (and a few huge bugs for the people brave enough to try it).