Silicon chips will shortly reach the limit of how small they can get before the channels become so small that they cannot pass any electrical current.
Carbon nanotubes can conduct electricity and are 500 times smaller than silicon transistors - only 10 atoms wide. This means that they could be used in the future to make the logic gates of computers.
The abovementioned displays do now exist, they're thinner and lighter than LCD displays and can have a higher resolution. Demo 15 inch models exist and they should be in the shops sometime around 2003.