Past may not be prelude
A lot of these predictions that the internet WON'T face much higher bandwidth demand is based on past statistics. But a paradigm break is in process. The past statistics can't recognize the tremendous growth of online high def video that is coming. Those predicting drastic growth may be more prescient than the statisticians looking backward.
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Ask yourself one question: 'Do I feel lucky?' Well, do ya punk?
Likewise online streaming HD may be dramatically less than people predict, and in any case if AT&T cannot deal with it they should look at their residential offerings and amend them accordingly, rather than predicting some nonsense bandwidth apocalypse on the wider internet. Contrary to the apparent beliefs of AT&T there is an internet beyond their access and core network which is doing just fine.
I'd point to the growth of AmsIX - »www.ams-ix.net/technical/stats/ - between July and November of this year they saw a growth in utilisation of over 50%, and this was accomplished just fine. In the AT&T world such growth is unimaginable, yet there they are supplying this interconnection bandwidth.