When most people think of electronic book readers, Amazon’s thin, white Kindle probably springs to mind. However, that could be about to change. A cascade of e-readers will hit the market this year, taking the devices far beyond gray-scale screens with features like touch navigation and video chatting — and probably lowering prices, too. It’s happening as other gadgets, such as mobile phones and tablet computers, give people even more choices for diving into their favorite books.
