Streaming HD content requires more bandwidth than standard definition programming. As more content becomes available in only HD, normal bandwidth consumption will balloon with no additional hours watched.
The newer 4k televisions can handle much larger streams.
Netflix and Amazon Prime already have some SuperHD programming available. More will be added to the cable offerings, too.
My cable co. increased by data allowance from 200 to 300 Gb and increased the speed from about 18 to 50 Mbps, for an increase in the Internet price, of course.
I have the 2nd level tier. Even when the data allowance was 200 Gb, I seldom ever got close to that, even with numerous times of binge watching via Netflix and other streaming sources.