Enter the brainwave control helmets! The ones for sale a few years ago were definitely geeky. They had electrodes, wires, and probably gears and steam engines. But today the helmets are becoming smaller, more stylish, and more sensitive.
Eventually someone (ghost of Steve Jobs) is going to make a product that has no controls other than a headband. Typing a paper will no longer give you carpal tunnel syndrome. And it could be faster for navigation, too, as long as you can remember what you need to navigate to.
And that's just within the next 20 years! There is every possibility that these types of controls will eventually be implantable, and that people will be able to continuously link to computers around them. You could have a iHouse that links to your iBrain. The danger, of course, is the possibility of viruses! There needs to be some damn good error testing!