I know this is a very old thread, but since then, concepts like sidechaining, the Lightning net, etc., have been developed since 2011.
If blockchain tech takes over more, Google will die because Google is centralized and blockchain tech is decentralized.
Since Google processes about 50k transactions per second (~a trillion / year) in its ad tracking campaign (far more than all the major credit cards combined), there's no way that with current tech this could be done on the Bitcoin mainchain. Hence, sidechaining would be necessary.
This is one hell of a grave dig. Wouldn't a pool be responsible for processing those transactions for work? I don't see how that would impact the blockchain.