2 kinds of people
Regarding Apple pre-release product news there are 2 kinds of people: those who know but can't talk, and those who talk but don't know.
If you really know anything then you will have signed legal agreements that prohibit you from saying anything, and which are serious enough to get you to keep your mouth closed. (I've signed them in the past with various companies including Apple, and you would be a fool to ignore them, especially since those who get to sign these things have a vested interest in staying in the game.)
Of course there is always a tiny bit of leakage of real info, but it is almost impossible to distinguish it from speculation or fabrication. In short, there is not reliable information about upcoming long-term product plans or release dates.