Microsoft has published a Windows 10 roadmap for Business and Enterprise customers that reveals upcoming features of the operating system as well as a planned release month for the operating system's Anniversary Update.
According to it, Microsoft plans to release the Anniversary Update in July 2016.
Cortana is also the best digital assistant at reminders, letting you set them in more ways including by pen, and [coming in July 2016] pulling reminder-relevant info from emails so you have the details at hand.
As I mentioned earlier, it would make sense for Microsoft to release the Anniversary Update shortly after the operation system's one year anniversary which would be at the end of July at the earliest.
While things may change depending on how development progresses, it is very likely that Microsoft will push out the free Anniversary Update to all Windows 10 devices around July 2016.
Upcoming Windows 10 Features
The list of features that you find on the page is probably what is most interesting from a user's and administrator's point of view.
While many are designed for Business or Enterprise use, some are available in all editions of the operating system.
Microsoft divides the feature listing into the categories "recently available", "in public preview", "in development" and canceled.