I happened to stumble across a gesture pad devised by Shekhar Borgaonkar. Needless to say, its one of the most wonderful innovations as per inputting Devnagri(Hindi) script is concerned. Due to its complexity, the Hindi based keyboards used today aren't user friendly at all. A beginner cannot think of using the same for text entry.
Interfacing the same to a touchscreen/stylus-input make it intuitive, and hence cut down the learning curve required to type hindi into Computers/cellphones.
Exactly as Shekhar says "I think this will benefit India because many people will be able to interact with computers for the first time in their life. "
The demo of the concept is downloadable here