The Remote Desktop Services (RDS) Team has posted blog highlighting updates to the Remote Desktop apps for Windows, Android, iOS and Mac.
Follow these links if you would like to try out the improvements on your device right away:
You can find a comparison of different capabilities between the different apps on TechNet.
- Remote Desktop clients - March 2017 update - https://blogs.technet.microsoft.com/enterprisemobility/2017/03/30/remote-desktop-clients-march-2017-update/
- Compare the client apps - https://technet.microsoft.com/en-us/windows-server-docs/compute/remote-desktop-services/clients/remote-desktop-app-compare