I'm more interested in: what's the future for UWP apps now? Another dead end like silverlight?
A cross platform UI library that runs on .Net core (ie. windows, mac, linux, android, ios), some kind of hybrid of ??? and Xamarin forms could potentially be quite a nice tool... but its pretty hard to be excited about the prospect with their track record of killed off UI frameworks so far.
However, what scares me to death as a user is that if UWP is let's say super-popular with developers 5-10 years from now, and everyone builds their apps as UWP apps for Windows, then Microsoft will eventually restrict "normal" users (read: most "consumer" Windows machines) from even side-loading apps from outside of the store.
If that's something that has even crossed the minds of Microsoft's leadership, then I definitely don't want UWP to gain any sort of real traction. And I'd rather see Microsoft improve user security through instant virtualization for apps, like what they're doing with App Guard for Edge, even if it's only an option users could choose, and not something that works by default for most or all apps.
Only with Windows 10 it became possible to sideload non-win32 apps.
Also I wouldn't be surprised if we see microsoft make a push to allow UWP to target Android.