Quote from W4rl0ck:
Just a way for GOOG to track every single page you look at on the web, archive it for eternity and throw up ads to every single page you view whether it has adsense or not.
Next they add in cloud computing and capture every single bit of data that runs thru your PC and store every transaction you make for all eternity.
Of course since they have that motto - don't be evil - they would never do anything with all that info. Just hold it for eternity. Nothing else.
The NSA must be sooooo jealous.