The diamond water paradox ought to be revised. These days a couple hundred shares of stock in Google or perhaps Facebook next year, can be worth more than a good sized diamond and may in certain ways be as essential as the water we need to continue living.
Of course, we haven’t reached the point where you’d actually have to log-in to your Twitter or Facebook account to buy a bottle of water at a convenience store.
Then again, there may actually be companies that are planning to integrate or have actually integrated Point of Sale systems (a.k.a cash registers) with either social networking websites. The idea behind this is that when you purchase something from these companies, your purchase shows up as an update on your social network and that will perhaps, for a time, have an impact on the “conversations” you think you may be having with the world. It’s kind of like Foursquare in a way but more directly tied up with actual purchases.