People forget the front camera, no, NO network in america could handle video calling. i had a nokia n95 and tried video chat once in europe where the network is far more superior than here (let alone at&t) and it looked like absolute crap, it looked like a seriously bad slideshow. ichat on iphone would be cool but i bet you my last paycheck you're at least 2 years away from that.
I think, being that this is a new patent, that something along the lines of "2 years" is probably what they had in mind, as by then the 4G network will be operational with ATT and Verizon using the same technology (by then, LTE Advanced) which can most definately handle streamed video as it is essentially WiMax Mimo IEEE 802.16m. UTMS is the transitional element carriers are moving to now, meaning video streaming (as well as the iPhone being available to Verizon) could be a reality as early as 2010, but likely in 2011-2012. If the Mayan calendar doesn't destroy us all first.