According to these guys: http://lazure2.wordpress.com/2012/06/28/nexus-7-google-wanted-it-in-4-months-for-199245-asus-delivered-nexus-q-of-googles-own-design-and-manufacturing-added-for-social-streaming-from-google-play-to-speakers-and-screen-in-hom/
" … Market sources indicate that Google will outsource production of the Nexus 7 to Asustek Computer, and purchase LCD panels for the model from Chunghwa Picture Tubes (CPT).The displays will have a resolution of 1280 by 800 pixels with CPT serving as the primary supplier, the sources indicated."
So ... apparently the screen is (or at least was) used in N7 manufacturing process.