Some numbers are wrong. There are currently 91 HD channels excluding Miniplex HD. There are 7 Hindi, 7 English (incl. Disney International) and 3x6=18 regional HD channels in 6 languages, totalling 32 (but that is okay as they would not have included Disney International HD and/or Zee Tamil HD as these were launched latest). And how come only 50 channels are available in both SD and HD? Except the following (totally 14 incl. Sony Rox HD), all HD channels are available in SD also (78).
Disney International HD, Star World Premiere HD, MN+ HD, Star Movies Select HD, Sony Le Plex HD, &privé HD, Sony Ten Golf HD.
Downscaled to SD: FYI TV18 HD, Nat Geo People HD, Baby TV HD, Nat Geo Music HD, D Sport HD, Epic HD.
Sony Rox HD's SD version can be considered to be Sony Mix.
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Nevertheless I am confident that we will cross the 100 HD channels mark when Zee Telugu HD, Zee Kannada HD, Colors Tamil HD and Cartoon Network HD are launched along with others.
There should be more HD channels in the kids and music genres. Also Odia, Assamese and Gujarati channels can try to launch HD channels in the next 3-5 years.