For a formative language, it would be wise for Apple to send a representative and for dotSwift to get Apple officially represented. I am sure the organizers understand this, but this would also mean a cultural departure for Apple.
I think it has to do mostly with the image they want to have in the developer community.
Plus, watching a HD video shot in a Theater like ours is arguably more enjoyable and impactful than something shot in a studio. You can check this as an example:
https://www.youtube.com/watch?v=GLQyj-kBRdo
Couldn't agree more! We really hope to be able to get them involved in the conference. FYI, Chris Lattner does speak at LLVM community events so it's not unheard of.
Shoot me an e-mail about having one of our instructors speak if you'd like, we launched the first in person Swift class ever in early July! zach (at) nycda (dot) com