I dont think a change to IPTV would make a difference. Theoretically, IPTV would take up less space since only one stream would be sent at a time. Just look at Uverse vs. basic cable. Instead of sending a standard broadcast signal, Uverse uses IPTV, which uses roughly 7mbps. Im not sure exactly how much space a broadcast stream takes up, but one could imagine if it were less than IPTV, Uverse would utilize it.
