specifically stated that they aren't out to recreate the cable model, only time will tell what that means. Ultimately, I think this is a big step in the right direction. Even if this first offering isn't perfect, someone, whether it's Dish/Sling or someone else, will likely get it right.
There's a lot of interesting info directly from their CEO in the thread and might be worth a read.
http://www.reddit.com/r/cordcutters/comments/2sfng8/sling_tv_ama_with_ceo_roger_lynch