describe the most fantastic input and output devices in the near future

about input：

We may have more advanced gestures and voice input and more advanced virtual keyboards to replace the current mouse and keyboard.
More ideally, we will have eye tracking, and even use brain waves to transmit information to the computer. We just need to think about it. The computer can then know what we are thinking.

about output：

Holographic projection. Just like the movie Iron Man, you can observe your holographic projection in all directions. You can move it, rotate it, and even operate directly on the projection. If this technology can be achieved, it is definitely an unparalleled tremendous achievement.