If tivo wins/settlement/etc, there is no way DISH is going to allow their DVRs to be turned off, or at least not the majority of them. They will find a way in the 11th hour to get a deal in place to allow the DVRs to continue working. DISH may be stubborn, but they wouldn't risk sending droves of their customers to DirecTV or Cable
Just like there was no way that Dish would allow its customers to lose Distance Networks? We still remember how that went down, right?
It could be quite possible that Dish could release a new update that works around the patent violations.
I was under the impression that Dish has already made the changes to their software. Anyone remember when all the 5xx series started crashing everyday? I was told then (last January) it was because of the "Tivo patent case" and that I should just move to a 625 (on the house) as the "point release" was actually a code rewrite and problems would most likely persist for quite some time until they worked past some fundamental issues.