It looks like all of the recent Nexus devices are covered - everything from the 2012 Nexus 7 up through to the Nexus 5. Of course, just because branches have been published for these devices, it is not absolute confirmation that this entire list of devices will receive an official L release. Nothing is certain until Google releases OTAs and/or factory images. Nexus 4 - https://android.googlesource
![Android "L" Preview Source Code Going Live In AOSP, Includes Support For Nexus 4, 5, 7 (2012+2013), And 10 [Update: It's Only Partial Source]](https://cdn-ak-scissors.b.st-hatena.com/image/square/354b7e75fdcd3bf3d81b2dce3adab36dc71473bc/height=288;version=1;width=512/https%3A%2F%2Fstatic1.anpoimages.com%2Fwordpress%2Fwp-content%2Fuploads%2F2014%2F07%2Fnexusae0_Screen-Shot-2014-07-01-at-4.02.37-PM.png)