said by LLStarks:Why no IPTV-to-the-set-top yet?
It's been 10 years and most TV providers are still dreaming about it like a far-off concept.
Because most last-mile networks don't have the capacity for it. And it isn't all that efficient.
The biggest IPTV implementation, AT&T U-verse, restricts customers to a maximum of 4 simultaneous streams, of which up to 2 may be in HD. Not good for a family of four who all want to watch and record different things.
Verizon's IPTV implementation, used for VOD, suffers from similar issues.