If you notice it, it’s not done correctly (which in games unfortunately seems to be always; presumably because it’s faked with a blur in post-processing). Few people complain about motion blur in movies, where cameras produce it through physics alone. It’s artificially added to CGI scenes so that they don’t stand out and distract the viewer.

What do you mean "if" you notice. I complain about it every single time. Of course, it's much worse in games. Only vsync is worse