AT&T offers free WiFi access to iPhones at hotspots and Starbucks

I got a SMS text and a email today telling me that AT&T is now offering free WiFi for iPhone customers.
If somehow my computer could use the WiFi I think that would be more valuable to me.  My iPhone has a 3G connection most of the places I go and that is pretty quick enough for me.  I’m not doing any internet intensive tasks on my iPhone that would really make a difference being on a WiFi network.
So what main benefits do we iPhone 3G customers get from this?  If you area has only Edge, then it might be cool, but I really could care less about a WiFi connection for my iPhone at a hotspot.