Default [Q] Full apps as widgets

Is there a way to have a widget that is essentially the entire app, condensed into a widget size? Similar to the way PA's Halo window works, but just as a widget on a homescreen?
I'm aware of XHaloWindow for Xposed, but it doesn't have any widget features. Just wondering if there's a way to do this via Xposed, or something like that.

This would be useful, for example, to have the entire Google Now app as a widget, similar to the Google Experience Launcher.
I'm on Twitter! @TunableTech

I'm on Youtube! TunableTech