When will comcast finally upgrade channels from sd to hd?

when will comcast upgrade channels from sd to hd?these are some still not in hd: laff,heroes and icons,charge,antenna tv,the movie channel xtra,screenpix westerns,hbo signature,hbo comedy,hbo family,wcbs 2 new york,wnbc new york,wabc 7 new york,outdoor network,fanduel,crime investigation network,fetv,start tv,cozi,deal,showtime extreme,showtime showcase,catchy comedy,get tv,cinemax action max,cinemax more max,cinemax outer max,cinemax thriller max,cinemax 5 star max,cinemax movie max,starz encore action,starz encore western,starz encore black,hsn 2,pbs kids,military history channel,cmt music,mtv classic,nick music,rewind tv,and comet.all of the pay movie channels are broadcasted in hd.i will not subscribe to cinemax again until they are available in hd.