Google have access to an international array of over 150,000 advertisers of whom may choose to penetrate offline markets in different countries. With Google’s strong network of advertisers, they may choose to appoint or allow offline distributors to create a format for Adwords advertising in content, in search and now offline.
More options could be implemented for AdSense publishers, allowing them to specify keywords of their own. While Google has been reluctant of this there's no indication that this will not happen in the future.
Also, a lot of people are demanding a clear specification of the pricing policy of AdSense. Google has given no indication of why this isn't public information but at this moment it seems highly unlikely that such information will ever be present on Google AdSense.
Another feature that could find itself into AdSense would be letting website publishers see which links are generating clicks on their website and based on what keywords they arrive there.
This could end up being a major issue that could threaten the entire system as it could perhaps encourage more adsense only websites as profits become more transparent. A lot of people may make AdSense-only sites, designed just for making profits through AdSense.
While this is already happening today, it might be foolish of Google to put such tools in the hands of its publishers.
However, one thing that could happen is a way for users to fix their issues with low AdSense generated income on their site. This could be done through an on-line wizard or something similar that would make suggestions to website owners based on their contents.
But the major buzzword of the day is RSS. The possibility of sending targeted ads directly to users without requiring any navigation on their behalf is becoming a reality with RSS. And there are clear signs that Google isn't going to let such an opportunity pass by.
This is what "interactive television" and similar items have been trying to do for quite some time now. But the Internet would be a much better medium for this, because there are no mediums quite as interactive as the Internet.
But in the end, this is mostly speculation and we are bound to have Google surprising us with new features we would have never thought of.
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