Lenovo just unveiled a new flagship laptop, the Slim Pro 9i. The thin-and-light PC features NVIDIA GeForce ... refresh rate or a 14.5-inch 3K Mini-LED display with a refresh rate of 165Hz.

But turn the laptop on and the 17.3 inch Micro-LED display ... first time Lenovo has used Mobile World Congress to show off some cool technology that may or may not ever see the light of day.

At Mobile World Congress in Barcelona, Lenovo showed off Project Crystal, a complete proof-of-concept laptop that will never see the light of day ... a 17.3-inch Micro-LED transparent display ...