The Dynamics 365 Roadmap site provides a snapshot of what Microsoft is working on. Use this roadmap to find out what is being made generally available and what is in development.
Here we can see Whats New, what is in development and what is previously released.
We can apply filters on Editions like Enterprise (AX) or Business (NAV)
We can also apply filters on Applications like Financials, Sales, operations etc.
Also on Areas like Project Management, Purchasing, Inventory etc.
Here is the link