With the release of the magnificent Windows Admin Center, this is pretty much obsolete. Leaving it here for posterity/potential future ideas that could come from it.
Web-based task manager for terminal server environment (experimental).
Right now, the performance is abysmal, and it's more of a toy than anything.
Might need to open up the Windows firewall for the account running the UAM service on the server:
netsh http add urlacl url=http://*:25100/ user=<service user name>