For those of you who are asking whether Papyros will support Google Play, or Android app x, or Android apps in general, here's what the general consensus is:
Android is about as close to PapyrOS as ChromeOS is, the kernel and coreutils are pretty much the only similarities, and even those are heavily patched for whatever device you're using. ChromeOS is getting the entire Android app ecosystem simply because they made a container technology to store the app AND the backend needed. PapyrOS doesn't have anything like that, just because Papyros uses the material guidelines does NOT automatically make it similar enough to android to run it's apps, the material guidelines are simply for UI look, feel, and interactivity, nothing more, nothing less.
Mods, feel free to take that bit and add it to the pinned post or pin this post as well (if the latter is possible), the multitude of people asking the same question that's been asked for months is getting old, I saw enough of that over at Elementary OS's community about their Loki release.