[jqpabc123]

Slightly off topic --- why do phones that only offer an HD display have 20 megapixel cameras?

The phone itself can't display it. It's possible but unlikely the person has any display that can show the photo in true resolution.

[dragonwriter]

> why do phones that only offer an HD display have 20 megapixel cameras?

Digital zoom (both while shooting and after). Digital-to-print.

Also, marketing.

[alonmln]

I assume it's partially because people zoom / crop images?

[jqpabc123]

So the cost of being able to zoom is data communication and storage consumption?