I may be wrong but touch screens are often color LCD screens and they are dark on stage. I think KPA philosophy is to get stage guys the most practical tools like bright readable display.
I heard that theory before and if true I agree, but I was talking about market expectations... most of the people who buys guitar gear will never be onstage. I'm not complaining about anything and I couldn't care less about the screen but I think Kemper would sell more units if they had a touch screen.
Btw I'm a big fan of having real buttons and I hate everything being on screens today, specially inside my car.