There is no NDA for stuff Apple already showed.
I thought no screenshots were allowed.
I understand changes have been made recently, allowing things to be discussed publicly, however I read that screenshots are still not allowed.
"Further, Apple agrees that You will not be bound by the foregoing confidentiality terms with regard to technical information about pre-release Apple Software and services disclosed by Apple at WWDC (Apple's Worldwide Developers Conference), except that You may not post screen shots, write public reviews or redistribute any pre-release Apple Software or services." - From the current agreement.
So to me, that says, no screenshots whatsoever regardless of whether Apple has shown it.