Its a long one, so if you want the highlights here they are, in, naturally, what I consider priority order.
1. Twitter will change how marketers measure success. Billboards and ads that rely on eyeballs for metrics will be supplanted with direct feedback from Twitterers. Instead of a billboard for a car hoping to reach commuters and influence them in some amorphous way, author Doug McIntyre suggests that viewers could actually Tweet the local dealership -- a much more effective measure of success.
2. Hyper-local marketing -- Twitter will become a great, inexpensive way for small local businesses to get information out to their marketplace.
3. Twitter will replace Forums and Yahoo groups as the place people go to discuss stocks.
4. Twitter will democratize both content and the advertising that goes with it.
5. Twitter will change how we collect and mine data.
6. Twitter, as the Red Cross has already demonstrated , will become a key part of our national security and readiness infastructure.
7. Twitter will become the new PayPal and Western Union
8. Twitter will become the fundraising vehicle of choice for non-profits.