Have been more than I thought. In this post on Brin and Vinge's books I thought that "softscreen" or roll up computer screens would not come to pass within 20 years. It looks like it may - Roll-up Laptop Screens? New 'Morphing' Structures Have Many Applications.
Another interface that I did not mention in the post was a head device in Brin's book that was used to interface with the computer - not quite mind reading but almost. This too appears to be coming to pass but may die without a "killer" app. I think it needs to develop into a "mind-reading" software similar to voice recognition without the voice.