Text will always be more powerful than graphics. You can easily memorize thousands of text commands, over a couple years. But scrolling through a drop-down menu or list of a thousand commands will never be fast.
Google is an extreme example of this. You couldn't possibly make a graphical interface with the billions of things people want to search. But you already have your language memorized, obviously.
There will always be people who want the power and speed of text, and there will always be people who don't want to bother with the memorization.