I am going to go out on the limb here and say that MOST existing customers will NOT want to upgrade to the XIP.
The XIP is designed for NEW customers. It is designed so the installer needs to run just a single wire into the house from the dish. From there the installer plugs the XIP into your cable television line and from there you now have satellite distribution throughout your house where ever there is a cable tv line installed. Now the tech goes to each TV you want satellite on and installs the joey box and boom you now have satellite tv there with no additional wiring.
It will cut install times and install costs greatly.
For existing customers the XIP setup will probably require rewiring of some sort, as at the moment each room has a wire coming to it from the dish or switch. You wold need to take the additional rooms and unhook them from the dish or switch and hook them up to cable tv splitters making it a cable distribution network for the XiP to work. I don't see many people wanting to do this. And honestly besides sharing recording on your DVR in all rooms you don't really gain anything that you don't have now.
The big flaw I see in the XiP is if your main XiP box goes out then you have no TV on any of your televisions in your house.
So I think it will be GREAT for new customers but not so much for most existing customers... except for those like us who like to tinker.
The biggest factor to anyone should be the price of the additional 110 boxes for each room . IF there is no fee attached , it would be cost effective to me to have the Xip series. Right now I pay $14.00 a month for two 211ks + dvr software + my 722k, which covers 2 rooms. The computer room I have an hdmi splitter so I can watch in the living room too. If I could do the same thing in 4 rooms and pay no extra fees to do it I would really consider it. The other problem for me would be the amount of timers you could create on the 813. I have 81 timers on my 722k and my son has his 20 timers for kid shows. My wife has about 20 timers for HGTV on her 211k and another 10 on my 722k. IF we are limited to just 96 timers period , I would have to reconsider on the 813. OF course I could use the 813 on my tvs in the living room and the computer room and the master bedroom, and keep the 211k in my boys room. Then everyone would win. Decisions ,decisions......