I have an OTA antenna and I use no streaming services at all because I think that (for me!) I can't see the point in cutting out cable TV if I was to then turn around and pay for streaming instead.
I tend to agree. The live streaming services are the same basic product as traditional cable and satellite, but typically bundled into a leaner package and distributed over the internet.
However, for those who want access to some traditional live TV and maybe can't get OTA, I think the "point" is that it
can be significantly cheaper. But I think the cost gap is shrinking. I pay $113/mo for internet, PSV, and Netflix. Our local cable provider offers a triple play for $89/mo (1st year price). But I'd still buy Netflix. And with STB rentals, the total would be around $120-125. So at $113 for my streaming setup, the savings are minimal. Now if I was coming off a bloated package, with a bunch of channels I didn't care about, no intro-pricing, and a house-full of STBs, paying $225/mo, then the $113 looks pretty good. But I think the true apples-to-apples comparison on price is not as compelling as it once was.
For me, the "point" is not so much about price. Rather, that the new live streaming services are simply better than traditional cable and satellite. It's portable, cloud DVR, easy switching with free trials, more on-demand, better user interface, better content integration, excellent search functionality, and lots of great (and affordable) hardware options including voice control, etc. The new streaming boxes are much quicker than the clunky old cable STBs. IMHO, it's just a better, more innovative solution in almost every aspect.