A WebmasterWorld thread has publishers talking about what they see the future of the Google AdSense program is. Some are talking about how earnings will continue to decline as the program matures. While others say it will increase as the economy recovers.
How about any danger to Google? One publisher said:
The only danger to AdSense is if advertisers discover a better advertising model.
Publishers here are not really talking about features expected in the future. But we have already seen Google expand AdSense from ads on a web page, to mobile pages, mobile apps, in YouTube videos, TV ads, radio and so on.
Forum discussion at WebmasterWorld.