|Topographic maps could really let you feel their topography. Image: Disney Research|
Researchers at Disney are working on a touchscreen interface that lets user "feel" objects. The interface allows you to feel properties of objects, for example bumps, ridges, textures, and protrusions.
Additionally, Disney research is also working on using air cannons to simulate touching digital objects: http://www.wired.com/design/2013/07/disneys-tiny-amazing-air-cannons-will-let-you-feel-the-digital-world/