I have Comcast and Play-On Media server. Web portal provides all network show with little or no commercials (mostly removed. You can pause but no Forward.) This negates the need for DVR at all. It also gets any network I provide credentials for and manages local library. It also allows you to record any web video for later perusal. Netflix, Crackle, Xfinity, Hulu, Amazon and so forth. You keep a list of what and where you are in episodes or binge blast anyway you want.
Only bad thing (well 2) is Better than low def but not the knockout of OTA or high level connection and sometimes (rare but does happen) streams break and you may have to begin again. (still no forward unless you pause let build up and then jump increasing disruptive stream.)