Tata press release says they have initiated internal re-organization subjected to board approval.
They could be merging it to sell it easily, or to offer DTH+Broadband under same management.
Also the fact that they are already letting Airtel use Tata's fiber make it possible a future sale may happen.
Anyway they are making this statement to indicate a future direction. It may or may not be done.
Airtel only has to pay the govt. some unpaid spectrum license fee of docomo for this acquisition (zero cash to tata).
The main thing here is that instead of selling TataSky to sweeten the deal they offered the Fiber network to Airtel.
The DTH deal is in freeze mode and now Airtel will have to pay high amount if they want to buy.
Still Tata is indicating they want to explore further cooperation.
So They Sell Tata Sky In Future Or Not What You Say Bro About That