I don't think there is much of a perf hit, I run every game @ 2560x1600 with a 290 windowed mode because I have side monitors I use and alt-tab a lot.
SLI works -
https://www.reddit.com/r/pcgaming/c...he_tomb_raider_via_windows_store_xbox/czlrcf5
Overlays work - DXtory does with DX11 UWP apps.
Its not encrypted at all, its just a wrapper over your files.
Its safer for end users - no registry, no extra installers can be "bundled" like mcafee or ad/malware.
Uninstall is simple, no left over files / registry entries.
People have no idea what they are talking about regarding UWP. I've actually used it and developed for it, its much better and will be much better once the issues of fullscreen are resolved.
Issues with programs not being able to detect the software running just requires those programs to be updated to support it, its not difficult.