No one knows the reason for this but one possibility is that schedules may be clashing. It is believed that Oracle has already booked the YBCA for October 4, which leaves Apple without their traditional venue. Another reason could be the fact that Apple need to be a little more flexible with their venue in case their launch date changes. There have been some reports that have suggested that the fifth generation handset might not be ready in time and that a staggered launch with a less dramatic iPhone 4S will be revealed first.
Apple could of course just be opting for a less dramatic event for the newly appointed Tim Cook to make his debut. He is expected to be taking center stage along with the iPhone 5 itself and we are sure that all eyes will be on his performance especially after what his predecessor has done.
Invitations for the launch event have not yet been issued so again this is rumor and speculation and we will have to wait to see what the official reports are when the time comes.
