Until there is no acceptable speech recognition, keyboard stay here.
Gestures and touch screens are useless for computer use.

You can play stupid games and make simple navigation out of gestures/touches but that’s all.

And machines are way far from being able to understand even a half-sentence if it’s arbitrary like ‘hey, open second life and log me in while i’m out in the kitchen.’.

Maybe you should rather re-program people to speak in computer-understandable way.

As for keyboards, you should rather make vertical keyboards and mice (see google for existing products) to preserve your hand’s health. Oh, you can’t see the nice led displays then…