Craig Hockenberry on his blog furbo.org on the OLED display in Apple Watch, its advantages, and why it will likely end up in more Apple devices:
Apple is a company that likes to leverage its technologies across a wide range of products. Look at how many of their devices are using IPS LCD displays now, then imagine a move to an OLED display pioneered by the [Apple Watch].
When Jony Ive taps the home button on his iPhone and says, “The whole of the display comes on. That, to me, feels very, very old.” it’s a sign that individually addressable sources of light are the wave of the future.
Educational and a good read.
Related: Source for the above Jony Ive quote.