Instead of using two cameras on the back of the Pixel 2 and Pixel 2 XL for a blurry background Portrait photo, Google uses a single camera and a bit of magic to capture some impressive photos.
Here's a hypothetical: You need a new fridge. You do some research, find a model you like, then proceed to shop around online for the lowest price on that model. Turns out it's at JCPenney.