The comparison has been many many, many times by people trying to run and dodge through traffic: it feels just like playing Frogger. Except it's terrifying, because you're the frog. This is particularly troubling in developing countries still in need of a robust public infrastructure to regulate traffic.
You've probably heard the term "procedurally-generated" thrown around gaming in the last few years. It's fancy tech, which at its most basic level means something that's built randomly each time you ask it to be built, but it's certainly more complicated than that, as content still needs to follow certain rules.
Wednesday's PlayStation 4 event showed us what next-gen graphics are capable of, so if you had any doubts that game environments could grow even better looking and more detailed, they're probably now gone.