https://www.microsoft.com/en-au/store/apps/windows
"it still can't be used to download and install boring oldschool desktop applications"
it can.
https://msdn.microsoft.com/windows/uwp/porting/desktop-to-uw...
"it still can't be used to download and install boring oldschool desktop applications"
it can.
https://msdn.microsoft.com/windows/uwp/porting/desktop-to-uw...
From your examples, I believe gamma settings would be accessible, but every tool I've seen that reliably monitors all network traffic uses a kernel-level driver and I don't think you can install kernel-level drivers from the Store right now.