This whole "coming this fall", "later this year", it's annoying. I miss the days when Steve Jobs used to say "and it's available right now, you can demo it in the hall outside, we're going ot make a billion dollars by tonight."
So... 2001? Because by 2002 (MacOS X 10.2) Steve was already "previewing" the next MacOS at WWDC for a release in the fall.
To be fair this is the conference for developers - not the general public