Well I can bring ONE good news.
The 21" iMacs are once more down in availability as they were during iPhone release.
I think they were going once again tried to launch iMacs in Sept, but failed to reach, so they produced new 2011 iMacs, which explained why stocks went so low, and how they got back up.
Now they are low again, and this time it could mean the new iMacs are ready (or they are once more delayed, but there is no WAY Apple INTENTIONALLY are keeping stocks low, neither for them self or for 3rd party resellers).
Amazon.com has still a lot (with 10.7 Lion installed)
Amazon.co.uk has none
Bestbuy has none
J&R has stock of highend 21" and lowend 27" but none of the others.
Apple stores have all, but in store pickup has fallen drastic for the 21" with restock date 11.oct.
Apple wants to make money like everyone else. They aren't going to go through october, and the entire x-mas season, with low stocks everywhere. Just not going to happen. Even though the iPod classic is EOLed they are still selling them, and stocks are fine!
Whatever happens happens, and can't happen any other way, but Apple aren't intentionally "not selling" Desktops.
----------
iMac & 13" rMBP as creation devices and iPad Mini as consumption?
Tbh, Apple this year got raped by ALOT of delays.
They basically switched screen manufactoring of their entire lineup. So: rMBPs were short, iPhone5s were short, iMacs were delayed and iPad minis were delayed.
At this point, they need to push these products out ASAP. I don't think they are waiting for some tactical brilliance, I think they are incapable of pushing the products. IF they 13" rMBP, iMacs and iPad minis are ready for the 17th, they will launch them all then. That's not to say they will all get demo time at the event, but they will be released.