London Telegraph 
March 19, 2013
In the online world – for now, at least – it’s the advertisers that make the world go round. If you’re Google, they represent more than 90% of your revenue and without them you would cease to exist.
So how do you reconcile the fact that there is a finite amount of data to be gathered online with the need to expand your data collection to keep ahead of your competitors?
There are two main routes. Firstly, try as hard as is legally possible to monopolise the data streams you already have, and hope regulators fine you less than the profit it generated. Secondly, you need to get up from behind the computer and hit the streets.
Google Glass  is the first major salvo in an arms race that is going to see increasingly intrusive efforts made to join up our real lives with the digital businesses we have become accustomed to handing over huge amounts of personal data to.