There is nothing changed in last 2 days that will motivate to shift to Tata Sky:
Tata Sky has all popular HD channels, TP space for future addition, Superior PQ & Good AQ, excellent Customer care and digital interface for Support !!
Whereas ADTV has major Popular HD channels, Space crunch for future addition and will never do more then 1-2 addition per month even if they get space will not do mass addition, and will take more then year to catch Tata Sky in HD channel count, Superior PQ & Excellent AQ, Average Customer Support....
But major differentiation is price if you can pay high price then go for Tata Sky, but if you have limited amount for DBR then Airtel is good option.... Specifically I don't want to pay for SD feed when I am going to watch HD feed of same program !!!