After some teasing, Paranoid Android has unveiled (in a lovely promo image) their plan for multi-window functionality on Android, which they promise to "get right," – Halo.

The premise is simple, yet extremely ambitious in scope – allow apps to give you notifications right on top of your screen, which allow you to pop into that app without leaving the one you're in (no matter what it is), take care of business, and resume your experience uninterrupted. The general concept, which rejects the notion of a distracting notification shade, and shuns implementations like "whacky s-multiwindow,"  is no doubt inspired by Facebook's admittedly awesome Chat Heads functionality, perhaps the most compelling feature of its new Home app.