What happens if you want to move to another phone provider which operates through the Internet? As people have said, nowadays most phone connections do anyway.

What happens if you want to move to another phone provider which operates through the Internet? As people have said, nowadays most phone connections do anyway. So why should the ISP phone connection be any faster than another one? And while today this may sound weird (we are used to have phone connections via our ISP) what happens if tomorrow's technology (say an interactive film) ends up in the same situation? A startup creates a field, just to get squashed by the ISP who picks up the idea (that clearly works) but gets extra priority because it is their own service.