The Microsoft RDV team has released a new blog post discussing the Remote App Improvements in RDP 8.1 in more detail.
Most of the info around Move/Resize and live thumbnails wad been previously published, but relatively new new is the GPO setting “Use advanced RemoteFX graphics for RemoteApp” which can be used to disable these improvements in case the impact on memory and bandwidth is more important.
“…In some scenarios, for example if users keep multiple applications maximized that have continuous screen updates, the features mentioned in this blog could lead to an increase in memory and bandwidth usage, which could impact high scalability. If performance is more important than these improvements and this is a core scenario for your users, it is possible to disable these improvements by setting the following Group Policy setting to Disable:
Computer Configuration/Administrative Templates/Windows Components/Remote Desktop Services/Remote Desktop Session Host/Remote Session Environment/Use advanced RemoteFX graphics for RemoteApp…”