I have a 23" Acer touch screen and I have no problem moving faders,panning ,mute, solo , setting loop points ,selecting screensets....
Even 3rd party stuff like BFD2. You can preview drum sounds by tapping on the GUI.
I couldn't see being without a touch screen at this point.
Every once in a while I'll miss a button or fader but I've had that happen using a mouse also.