No matter what I think those predictions are way over-stated! Apparently the total energy consumption from 2000-06 was only doubled even though Internet traffic increased by 3.2 million times... (or something like that). So the future of energy consumption is linear But I guess u have a point, that the internet is using up a lot of energy, but in 10 years I really, really doubt the internet consumes the same as the entire planet.
Apparently in the US the data-centers consumes 1,2% of the total energy consumption:
http://www.infoworld.com/article/07/02/22/...rinsight_1.html