The new LTPO display on the Series 5 (left) doesn’t seem to physically look all that different from last year's Series 4 display (right)—which also used LTPO technology. But Apple has been busily tinkering under the hood.

We know there's at least a new display driver and power management IC in there somewhere to enable the always-on feature. Without a significantly bigger battery, this watch stays awake by sipping power more efficiently.

The LTE antenna connector occupies its usual spot, but a change in form factor prevents these displays from ever working interchangeably.

The resolution and dimensions are still the same: 368 × 448 pixels on the 44 mm version covering 977 sq mm.