Even though its been on the market for a year, I don't think people fully understand the transformational impact of the iPhone as a product and as a platform. Today, as Steve Jobs hops on stage rocking a black mock turtleneck and jeans (just a guess), it will begin to become a lot more clear to a lot more people. Your phone will soon take over most of the functions that you rely upon your laptop for right now (and of course, be capable of many more things that a laptop could never do). That's a big deal.
Expect the announcement of a new version of the iPhone with a significantly lower price point and a slew of AMAZING applications that have already been developed for immediate download that will simply make the digital aspects of your life easier.