Re: An article about a rumour of an Apple product feature. Hmm, slow news day?
Haptic feedback isn't simply vibrating the whole device, it is selectively vibrating small areas of the screen (i.e. under the finger you force touched with, rather than other fingers that may also be touching the screen)
Apple filed patents a few years back showing this being done in a way that allows replicating the feel of various textures and raised/lowered surfaces under your fingers, so you feel like there's a button you actually depressed even though the screen does not physically change shape. Not saying they'll go that far as it may be too expensive or difficult to manufacture by the hundreds of millions, but given how Apple is always pushing to make the display thinner and thinner, a necessary precondition from their patents, who knows. They file a lot of patents they aren't able to follow through with, hopefully this will be one that makes it into products because it sounds like it could be useful if done right.