For the author, using touch input on a small tablet is a pain in itself. Not to mention the painful bit error rate of those with big fingers. There is a technology under development that can recognize your finger movements through the camera. In this way, any plane can become your keyboard. This technology developed by Fujitsu is realized through a piece of software. The software improves the accuracy of your finger size and color after a period of learning and analysis. When the learning and analysis process is over, it can become a substitute for the keyboard, so you don't need to carry keyboard accessories. Of course, the follow-up must rely on the continuous development and upgrading of Fujitsu and the touch feedback of users on this technology.