Let's be real: typing your password in order to sign into an app on your phone or tablet is one of the most annoying things currently known to man to exist. It is maddening. The best way around it? Google Account sign-in - because Android lets you do it without the archaic "actually needing your password" part. On a smartphone or tablet, it just makes sense.
So, IMDB's app for Android now allows you to do that.