There are other ways, certainly, but those other ways aren't what the general population is being conditioned to enjoy. Books (ie, the actual paper kind) are about 3 levels above vinyl collection in popularity. The idea is entertainment flowing through a set of your own personal devices, with no actual ownership, so once data limits become imposed (as we're seeing in this thread), people will have a tougher time adjusting.
Consider this as well: 4k televisions are currently a 'waste' technically for most tv viewers, seeing as streaming isn't really available in said format.. yet that standard is being pushed for newer televisions constantly, and prices are getting low enough that it's almost the standard. At some point, there will absolutely be demand for 4k streaming, which is an even better opportunity for caps to be in place (and exceeded, if the service providers get their way)