Stuff-Review was the first to consider that the iPad HD (a.k.a. iPad 3) could have some form of advanced haptic feedback. Our speculation was based on the iPad event invite, which calls for something new to see and touch. Apple is no stranger to this technology since it has been doing its own research, and it would just really make sense to have tactile feedback technology in the iPad.
Advanced haptics would enrich the iPad experience by bringing the sense of touch to the mix. It would make typing on the iPad akin to typing on a physical keyboard, provide tactile feedback on user interface interactions and it would bring gaming to a whole different level. Then you never know what else might come up from enterpreneuring app developers.