Pokemon Go uses data from the GPS and pedometer in your phone while Google streetview literally uses nothing when you're just scrolling through it.
when i wrote this i didnt have pokemon go xddd i just thought it would watch what your camera was seeing and then will show pokemon depending on the place
You can cheat it on android if you have one of those tools that can modify your location, seems rather useless tho unless you live in the desert with nothing near you whatsoever