THERE ARE two futures in front of us, the one we are taking and the one we could have. The one we are taking is easy to describe. Take the Net, mix it with the fanciest TV, add a simple way to buy things, and that's pretty much it. It is a future much like the present. Though I don't (yet) believe this view of America Online (AOL), it is the most cynical image of Time Warner's marriage to AOL: the forging of an