I hope one day we'll have shape-changing touchscreens which can grow physical buttons that can be pressed, and that could be operated without looking.

Something like a braille-capable touchscreen would already be a great improvement (concept art: [1][2])

This is technically 2.5D, and 3D would be even better (imagine a screen which can grow a joystick!).

While 3D-shape-shifting screens don't seem to exist even in SciFi, 2.5D displays are already being worked on, and would be a huge step up.

[1] https://www.yankodesign.com/2017/01/26/touchscreen-how-about...

[2] https://www.popsci.com/new-touch-screen-design-could-display...