But it's in no way better.
A keyboard has a use - as does a mouse. It' the quickest method of entering data / or moving to a desired point on a screen (with acuracy) with the current technology that we have. A touch screeen will have to come a long way before it replaces either of them.
This has already been proven with voice recognition (which during the late 90's was supposed to be the next big thing). Until it advances enough to actually understand what you are saying (or doesn't require training), or when you want to correct a word quickly - then it will always be 2nd choice - or be the choice of people who can't type easily - or due to disabilities.
And my main gripe is the RSI problems associated with touchscreens. Believe me - for older people - they are a big no-no - simply because you can't rest your arm/wrist anywhere - and after 1 hours of keeping your hand above or in-front of a touchscreen, things get very painfull. And that will affect everyone eventually.