Are you sure? Afaik you can convert most apps to UWP apps but they don't have the same rights and capabilities as the oldschool desktop apps. I don't exactly know what the limits are but I doubt stuff like Wireshark or f.lux could run as an UWP app.
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.