I picked up a Dell touchscreen laptop and literally have never used the touchscreen. I even forgot it has it. I just can’t see any reason to use it and how it’s better.
Touch is definitely much faster to get through certain styles of forms. The first that came to mind where I'd often tend to touch is the TFL (Transport for London) journey planner.
This is not to suggest replacing a keyboard with a touchscreen, any more than suggest a keyboard is no longer required since a mouse or trackpad is available. It's just an additional form of input, and one I'd personally definitely miss.