AT&T has provided a horrific experience because they were the exclusive iPhone carrier. Now that Verizon has stepped in, we can immediately feel the impact of COMPETITION.
Unlimited data, mobile hotspot, a network that actually works for voice and data, and more to come. AT&T will now be forced to compete. This is why the Justice Department looked into the AT&T exclusivity. AT&T was able to give us horrible service, because it could - if someone wanted an iPhone they were forced to deal with AT&T which couldn't even provide what was promised let alone features other carriers were giving away.
I believe the best news came in the QA session. There is no exclusivity agreement for CDMA. T-Mobile, Sprint, and etc are sure to get the iPhone too! This is a big day for consumers in the US.