We can't really say that the new Nexus 7 has been the worst kept secret, because we have known quite a bit about the Motorola Moto X as well, but the Nexus 7 has been up there as far as badly kept secrets. We've been expecting the new tablet to be announced along with Android 4.3 Jelly Bean, and those announcements have finally been made...Source: http://www.phonearena.com/news/New-Nexus-7-and-Android-4.3-officially-announced_id45675
