You don't need a crystal ball for this one, because of so many people waiting and wanting the next gen MBP
I disagee, I think consumers as a whole have understood that MBPs have not been updated for quite some time, hence the falling sales, over the past few quartersI think you'd be surprised how most of the world will not even notice or care about what generation laptop they are buying.
See this thread: Apple Invites Media to 'Hello Again' October 27th Mac-Centric EventWhen is the big announcement?
It depends. Apple won't pre-order as many as they do for the iPhone but there is much less demand for mac compared to an iPhone.
Given the cost of the mac and that PCs aren't too much worse these days. I feel that they've caught up. If Apple don't do too much with the mac there will be some upgrading and some new Mac users but this overwhelming demand that others have alluded is not apparent to me.