Yep. You can already do this with the Dishanywhere app. I have AT 120+ currently on my HWS setup. My parents have AT 250 and a hopper with a sling adapter. I occasionally use Dish Anywhere from my parents account to watch shows I don't get in my package. When I do this I use the iPad app and airplay to my Apple TV. It works fine.
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Sent from my iPad using Tapatalk HD