Within the next few years, everything will go towards NUI (this is already happening, see iPhone, iPad, Microsoft Surface etc). Most of our computer interaction will be touchscreen and voice control. Of course keyboards, mice etc will still exist, but they will not be the dominant way of interacting with your device (computer, tablet, smart phone, tv, or whatever).
There are videos all over the web, and statistics everywhere already proving this. Just take a look at the "vision" projections from any computer, software or device manufacturer and you will see that this is not an option, it is happening.
Some examples...
http://www.youtube.com/watch?v=OoyfTciK4jg&playnext_from=TL&videos=kmqyijM6tVU
http://www.telegraph.co.uk/technology/news/7801657/Samsung-announces-Galaxy-Tab-tablet-computer.html