Thank you for reaching out to us here in our answers forum! That's a great question regarding viewing your Dish 722K via the SlingPlayer for iPad without an actual Slingbox. You will actually want to check out the Dish Anywhere™ App. for viewing your Dish channels on your iPad without a supported Slingbox model.
Here is a link to the Dish Anywhere™ App:
Hope this helps!
The Sling Moderation Team