WiFi Access to TV Shows

Through my Apple TV device I have access to movies and TV shows available on Netflix and iTunes. I subscribe to Netflix online and rent individual titles from iTunes, so I know that accessing entertainment online is not impossible. I am also able to view current TV shows via DishNetwork online the day after they are broadcast on satellite TV. So when are we going to be able to watch shows in real time on our computers, tablets, or smart phones? Or when are we going to be able to purchase services from any provider online, whether they're our local satellite provider or not?