We have just returned from a great event in Tampa. One of the major announcements was the public launch of Dynamics 365. Have a look the “first look” to get a feel for the offering.

In a nutshell, Dynamics 365 offers a standardized base that can be extend with Apps. Apps are either pre-packaged or company specific. These are used to extend the functionality of the standardized base to meet your needs.

https://www.microsoft.com/en-us/dynamics/dynamics-365-first-look