This is a good step. Interoperability may be possible but it will be limited to within DTH and Digital Cable, as both these work on different technology. DTH is DVB-S and Cable is DVB-C.
Now the following question arises ?
1. Different DTH/MSO operator on different encryption systems, and STB firmware which also includes middleware and headend equipment.
Tata Sky/Airtel and D2H work on NDS
D2h also has irdeto
Dish TV has Conax
so one STB will not work on other DTH services as they use different software. It will work if all DTH use same firmware, middleware and headend equipment
2. DTH companies brand their STB by having own company logo on STB, if one does change the dth services, wouldn't it be odd to use another dth services by using other brand STB ? Also what about the finger print and logo on channels ?
3. A smart card is needed to be paired with STB to get services, by changing service provider what happens to the VC ???
4. Also the dish will be needed to be changed/aligned if one moves to another operator ? who will do that ?
5. Different DTH services work on differnet satellites and frequency, FEC, Symbol rates. Who would feed in new TP data for new service ?