Bobbie Johnson thinks there are too few:
I'm not suggesting that the only way the electronic book industry can succeed is by promoting piracy. But without it, there's no whip to crack. There's no easy cause and effect to startle the publishers out of their leather armchairs and into action.
I suspect that the real change will come as more authors who are already part of the digital age push for new things. But that's a generational shift, and we're still a long way from it.
It's not that I don't believe electronic books can't be a success - just that without an outside factor that can push things faster than the industry is comfortable with, progress is always going to be very, very slow.