[Jefff8]

1. Won't happen at 100% penetration. Horses are still ridden. Some people still use quills. People without adblockers become more valuable.

2. Personal, targeted advertising rather than mass advertising. [Only you can see this: Why not try a holiday in Greece next year - it's cheap and the beaches are great, fantastic culture and the people are pretty easy on the eye.]

3. It will be as good as a cold coke on a hot day when adverts are in-place in content. Heck, you'll be paid by advertisers for including product references.

4. People will pay for some things that they don't pay for now.

5. There will be an increase in sponsored material. [This reply brought to you by Drupal. The finest CMS you will ever use.]

6. People will be paid to not have adblockers switched on. [Thanks for reading. Now click here for your $1 - news.ycombinator.com.]

Things change. Nobody expects economies to be static any more, do they? People will invent new ways or re-invent old ways.

Edit: Meh. Bad formatting. And added more ads.