With the change in technology, it seems that IPTV offers, will not need a separate set top box. Television sets becomes "smarter". Nowadays, they are not devices with just a monitor and tuner but devices with hard discs, operating systems. You can download applications to your TV, as if your tablet or phone. You can also use your phone / tablet to control your TV. Hence, TV and phone / tablet becomes more closer.
On 25 of June in Krakow, Poland these issues and more will be discussed in detail at Digital TV event. If everything goes as planned, I will attend the event and hope to see you there also.