Reto Meier, an “Android Developer Advocate for Google,” recently laid out a forecast of where computer (or at least mobile) interfaces are headed:

Five years from now: first widely available flexible displays and built in HD projectors

10 years from now: transparent LCD patches that can be applied to regular glasses, and full virtual keyboards and voice input eliminate physical keyboards entirely.

20 years from now: contact lenses that project a visual feed directly onto your retina, and we’ll interface with computers through mind control.