I looked into switching from DTV to streaming services a little over a year ago and then again recently. As a heavy sports subscriber, I just can't see the cost savings. Plus, I'm not sold on relying on Internet connectivity and speeds just yet.
Re: the cost, you've realistically got to have an unlimited data service, which isn't cheap. Even setting up an HD antenna to receive all local over-the-air programming (FOX, NBC, CBS, ABC), there are so many different sports channels needed (ESPN, TNT, TBS, FS1, B10 Network, Pac-12 Network, NBCSN, etc, etc) that it ends up costing about the same as I'm paying for DTV. FubuTV, Sling, Hulu, etc. all have packages ranging from $30-60 per month and not all of them include everything.
Re: Internet connectivity, I'm just not convinced it's consistent enough. I was at a friends house within the past year where the big fight was only available via streaming service. And it was a horrible experience. The feed kept freezing. And lots of subscribers were having the same issue.
That typically doesn't happen with cable or satellite. I don't want to be at the mercy of my ISP or bandwidth of the area I reside in.
Imagine watching the Super Bowl or any really big game event and your Internet connection goes down. Or the speed greatly suffers because others in your area are doing the same thing. I need a more consistent experience for LIVE sports.