I don't think we will ever see a 6 tuner hopper unless Dish figures out how to make it all run on a single coax cable.
Many of us on the boards say 2 cables is not an issue, but the fact of the matter is that when the first dual tuner receivers came out and required 2 cables there was a high percentage of new connect cancellations due to customers who had pre-wired homes not wanting a second cable ran outside of their house, or where in situations where a second cable was just not possible.
They could license the SWM technology from Directv, but I don't see that happening