A hardware Kindle is essentially a single purpose device. With worldwide 3G connectivity it verges on magical. Yet Amazon does its best to limit the connectivity — pushing it to all but the most expensive tier — and complicate the interface on what should be one of the most simple, most intuitive electronic devices on the market.
It means we can now assume that — when inside of a book — any tap on the screen is explicitly to interact with content: text or images within the text. This makes the content a first-class object in the interaction model. Right now it’s secondary, engaged only if you tap and hold long enough on the screen. Otherwise, page turn and menu invocations take precedence.