Comcast and the other ISPs are ever going to "cut off" access to anything.
What they have done and will continue to do is to make it extraordinarily difficult to use other companies services that replace their own. For example, many ISPs today are now putting in bandwidth caps. They claim that they only affect the top 1% of users. This may be true today, but once 4k 60FPS content becomes the norm. those bandwidth caps will affect everyone.
Of course, they won't actually affect everyone. But Comcast can use the threat of enforcing them as a bargaining chip with Netflix, Amazon, HBO/Time Warner/AT&T...
I agree with the first point which is why I asked.
On the second point, the fact is that while bandwidth caps will affect everyone, so will everyone streaming 4K video. That seems like a self defeating argument.
What they have done and will continue to do is to make it extraordinarily difficult to use other companies services that replace their own. For example, many ISPs today are now putting in bandwidth caps. They claim that they only affect the top 1% of users. This may be true today, but once 4k 60FPS content becomes the norm. those bandwidth caps will affect everyone.