Well, 1 think i know for sure, DTH companies will be forced to unpair their smart cards, once all those small and big cable-walla's adopt digitization, or, there would be heavy, heavy loses !
See, for eg, i take an stb from a local cable walla, after 6 months i want to switch to dishTV, and I wcant coz my current stb wont work with dishTV. Also, If i am to buy a new stb, i will always check for universality of the stb, rather than operator specific hardware !