I’m about to buy something from a vendor (in a store with a smart card or online). At the last minute, Web4 jumps in and asks if I want it cheaper, or if I want it from a vendor with a better reputation. Not based on some gamed system, but based on what a small trusted circle believes.
My PDA knows I’m going to a convention. Based on my email logs, it recommends who I ought to see while I’m there–because my friends have opted in to our network and we’re in sync.
I can fly to the CES for half price, because Web4 finds enough of us that we can charter a flight.
I don’t have to wait for Rickie Lee Jones to come to town. Sonos knows who the Rickie Lee fans are, and makes it easy for us to get together and initiate a concert… we book her, no scalpers necessary.
I don’t get company spam any more (“fill out your TPS reports”) because whenever anyone in my group of extended colleagues highlights a piece of corporate spam, it’s gone for all of us. But wait, it’s also smart enough that when a recipient highlights a mail as worth reading, it goes to the top of my queue. If, over time, the system senses (from how long I read the mail, or that I delete it, or that I don’t take action) that the guy’s recommendations are lame, he loses cred.