We knew this was coming, but Google just showed off the Android L release at I/O 2014. The entire thing appears to be based off off what we've come to know as Quantum Paper, but they're actually calling it Material Design in the release. It's so sexy.
It's definitely a very content-driven interface, with simplicity and minimalism the primary focus with the primary UI.
L appears to be a pretty major overhaul in both form and function, with things like enhanced lockscreen notifications, new navigation buttons, and a focus on fluid design and animations that make sense.