Have to look up the numbers, but for now:
- Sony is rumored to have sold 500.000-600.000 devices (pre PRS-350/650).
- Pocketbook says it's selling about 50.000 devices/month worldwide.
- Bookeen strived to sell 50.000 devices in the US in 2010. Don't know if they reached that goal. Expect the same numbers or less on the European market.
- Any other devices usually sell 5.000-50.000/year, if at all. If their companies aren't out of business by now, that is (the undead legion of Netronix devices).
The nook devices are left out intentionally since they aren't officially sold outside the US, and I was referring to the rest of the world.
So I wouldn't really give a second thought about ePub if I were Jeff Bezos. ePub is a format officially dominated by Adobe (InDesign, ADE) and favored by early adopting techno geeks (sorry, kids
) which are a marginal group.
Most end users don't care about the format at all. They want an up and running system.