adcurtin Yes,the term, E Paper, is actually quite confusing since it is a collective term for mutiple technologies to achieve the same purpose. E Ink may be rarely referred as E paper as your understanding but it is definitely one kind of E Paper display technoligies based on definition of E Paper. That's also why somebody confuse Pebble's display with E Ink display.(E Ink is the first kind of E Paper technology so people always think E Paper equals to E Ink which is not always true.)

Conclusion: Pebble's display is E Paper but not E ink display.

The Kindle uses a technology called electrophoretic display which is produced by E Ink corporation while Pebble's screen uses another display technology from Sharp called Memory LCD. They are using different technologies but both classified as e-paper display(Electronic paper display).