Finally, The world is evolving towards a new mode of interaction.
Where human doesn't haveto give inputs to machines using some input devices like keyboard, mouse, touch etc. rather machines are made capable to understand human body movements and take inputs accordingly.
I will like to give it a new name UUI - i.e. Ubiquitous User Interface
Some examples of this are Accelerometer based inputs in many devices, Microsoft's new Project Natal for XBOX 360 .
Refer my previous blog posts on Sixth Sense, iPhone SDK showing accelerometer based input. And now have a look at this demo of Microsoft's Project Natal for XBOX 360:
It shows, how technology is gradually evolving
from Punch Card based instructions to Command line based instructions to Mouse / Digital Pen / Joystick to Voice / Touch / Accelerometer and now to Observation
for interfaces, from Console to GUI to IVR to UUI
What's Next ?? TUI -- Thought User Interface User can just think of an action and machine will understand :)