When will ALL premium movie channels from each network (HBO, Showtime, Starz, etc.) be available for live viewing in HD? It's been years since HD has been available yet we still only have one HD channel for each of the channels broadcast from each premium movie network. All other cable and satellite providers have all movie network channels in HD except Xfinity, which at this point in 2018 is truly unacceptable. Can someone from Xfinity please provide solid info on when all premium movie channel networks will be broadcast live in HD? Thank you.