Quoting usability expert Jared Spool, Good design, when done well, should be invisible. This holds true for ML as well. The application of ML need not be apparent to the user and sometimes (more often than not) more subtle uses of ML can prove just as impactful.
A good example of this is an iOS feature called dynamic target resizing; it is working every time you type on an iOS keyboard, where it actively tries to predict what word you're trying to type:
Using this prediction, the iOS keyboard dynamically changes the touch area of a key (here illustrated by the red circles) that is the most ...
