Sorry, but it's a bit naive to believe if there were no such thing as DVRs that cable/sat providers wouldn't still charge an arm and a leg for service. And many people live where they have no choices, or all the choices do the same price-gouging; they charge a reasonable rate for about a year, then up the rates to the upper stratosphere beyond that.
It's funny- but I remember these same arguments when the VCR was first out- the studios were whining that they'd never get anyone to go to the movies ever again if they could just tape them. Then they figured out, stop being dumbasses and SELL movies, and each time a new format arrives, SELL the same stuff again! Now they make more money than ever off the very thing they first railed against.
Meanwhile broadcasters whined about people fast-fowarding past the commercials. Broadcast TV is still wildly profitable.
The bottom line is, there's still plenty of viewers that watch the commercials, and a hit TV property is in no danger what-so-ever of its creators/networks going broke, in fact, they're making sums of money their predecessors couldn't even fathom.