Disadvantages of IPTV:

There are some limitations to IPTV. According to Wikipedia, because IPTV is based on the Internet Protocol, it is sensitive to packet loss and delays if the IPTV connection is not fast enough and it also does not support HDTV at the moment. AT&T is currently experimenting with HDTV and its U-Verse service in the Houston area according to Cable Industry Insider.