Just guessing but what if Tata Sky adds &Xplor HD alongwith this on GSat 10 in HEVC format and starts migrating HD subscribers to New HEVC box. Some r already having HEVC boxes , few older ones need replacement and this will give them adequate bandwidth rather than investing on new transponders.
They have already moved important HD channels to dedicated GSat 10 TP's. They need to give some benefit otherwise subscribers do not show interest to upgrade, same happened during MPEG4 migration which was much bigger exercise