Wow, you don't even know what an "educated guess" is (it's a guess based on prior knowledge and experience)! Therefore, it is not baseless speculation. For example, mbp refurbs, in the past and after release, have come out two months later (I am just using this as a possible example). Not, your best educated guess is that they will be out tomorrow.
As far as no one knows, a lot of people had a good inkling about the iPhone before it came out. Again, you must work on your reading comprehension. This site has had many members speculate, with good accuracy, on many number of things (they had very good educated guesses). Hence, the success of this site.
Lastly, you and all of these other members who get annoyed at certain questions posed should stop reading them. By posting the question in the title, it's pretty clear what the post entails.