I hate to say it, but the article starts off wrong right away. Verizon does not have IPTV running on FIOS. Its just CableTV, but it has the electrical cable signals converted to optical to run over the fiber.
Verizon does intend to migrate to IPTV one day, but they (wisely) did not want to start out of the gate with an unproven technology. If they did and had service problems with IPTV, then customers would not only drop their video service, but when they called the Cable Company back, the cable company might say "Hey, did you know that you can also switch over your phone service to us? Oh, and also drop your DSL for our cable modem?". So not only could Verizon lose your Video patronage, but they could potentially use their current revenue streams as well if the Video service makes a bad impression.
So far trials of IPTV from Microsoft and others have been problematic. So its still in the works, but not currently available.
BTW: That Verizon FIOS STB is the exact same Motorola STB chassis that Comcast uses around here. Considering that FIOS is the same Cable TV technology, that makes sense.