First things first the DMA is a replacement of the Upgrade Adviser. In fact it’s an upgrade of the Upgrade Adviser. It has some amazing new features.
You can install this on a workstation. It doesn’t have to be installed on the server itself.
You can have multiple projects saved with data from multiple server/instances.
There is the option to get compatibility issues and/or new feature recommendations.
You can check issues/feature recommendations for upgrades to 2012, 2014 or 2016.
Looks like it’s a step up from the old Upgrade Advisor.