The main reason there isn't is because e-ink tech is controlled by a company with a strict and expensive licensing arrangement. Until the patent expires, we're unlikely to realize the technology's full potential.
The real reason e-ink hasn't seen much innovation is that it's a tiny niche market, because e-ink is useful for e-readers and not much else. In contrast, LCDs are produced at a rate of billions per quarter, which gives room for lots of companies to compete furiously.
When? Where? How? Is this based on your direct experience? Please share some evidence so that your claims can be verified.