Given my forza knowledge, and having followed that crazy man, Dan, for years, here is what I understand of this article:
Basically,
I will put this in forza 3&4 terms to make it easier to understand.
Forza 5 will be delivered in two discs like those previous forzas, but difference is that while 3&4 had the two discs inside the game box,
In forza 5 you get one in the box you will buy and second disc on the "cloud"
Like 3&4, as soon as you installed disc 1 you where ready to go, but those extra ferraris and those extra tracks where on the second disc,
that you could install anytime you wanted.
In forza 5, the "second disc" is online, so that up to he very last minute they can add stuff. It makes sense because launch game.
I think Dan makes this comment about how this downloadable data is
part of the game, because
in the past forza's dlc tracks did not become part of the career mode, and where basically just for doing single events.
So I would suggest that people read this article for what it really means, not wha it looks like..
That being said,
if microsoft does not allow me to psysically detach fucking kinect,
t10 can bring baby jesus as a drivatar doing miracles IRL while racing, and i still wont buy the fucking machine!