That's Apple's stance, which I disagree with. Even today, some tasks are just faster and more natural with touch regardless of whether it's on a desktop computer or a tablet.

Incorporating touch into a desktop OS also forces the industry (PC manufacturers, software developers, etc.) to innovate and think outside the box. Perhaps in the future, we no longer position our monitors upright all the time.

Lastly, if you don't like touch-based interface, you don't have to use it.