That is one of the major changes that are happening. * Existing user interfaces (screens, mouse, keyboard) have made sense because they were the lowest common

That is one of the major changes that are happening. * Existing user interfaces (screens, mouse, keyboard) have made sense because they were the lowest common denominator and because prices could be kept low this way. * Now, prices for hardware are dropping (we will soon have the first wifi chip for less than 1 USD.). That means that we can explore completely new user interfaces, ones that are perfectly designed for the person and their needs. You don't need to have a user interface anymore that is designed for billions of people. You can manufacture several kinds of user interfaces quickly and that suit millions of people, just better. * Manufacturing is also becoming much easier and cheaper. There are more and more robots that can do complex work. They are also becoming cheaper and more capable which also influences this aspect. * I believe that the future of user interfaces does not lie in centralized, generic devices but distributed, specific interfaces.