What's to say the cable cos don't meta the commercials in such a way that your FF/Pause functions are disabled whenever a commercial is being displayed?
I think you just found a good way to get the content industry on board. Show them the advertising dollars.
the only way I would support this would be if the cable cos invested the money to store EVERY show at EVERY time on EVERY day and retained them for 1 week. That would allow me to go back in time and view a show that I might have missed; maybe I didn't know it was on or something.
I think you just found a good way to get subscribers interested. Show them an easy to use service that gives maximum flexibility.