From the site: "People have been dreaming about video calling for decades. iPhone 4 makes it a reality."
Video calling has been around for over 40 years. It just never catches on because it stops being cool after the first try.
One thing Apple are amazing at is taking an old technology that never caught on, getting a mass market to use it, and they usually make it look like it's new.
From what I've read almost everything on the iphone 4 has been done before.
[Edited by ghost42, 6/9/2010 6:22:37 PM]