I doubt that touchscreens will become primary way of interaction fr a long long time.. But I do see imporance of having support.
Also, touch screen is great when more than one person works on a same screen at the same time. Imagine scenarios that I encounter all the time in my company:
a) computer guy is working on some presentation/website and CEO is standing behind his backs and telling him "move this here, this should be a bit here" and so on; main problem is if you have doezens of elements is - WHICH piece do you want to move? He can point to you, but your perspective (sitting, closer to screen) and CEOs (standing, farther out) is different, and you have to keep guessing. Now, with Touch, just let him select the object, and operator can do everything else he desires
b) user is doing something and calling for help, guy that comes to help sees what the user is doing and is telling him to click THAT icon. Which? THAT! OK, let me show you .. Takes a mouse from users hand, and clicks for him. Wouldn't it be easier that he just approaches the screen and "clicks" it by finger?
There are many more scenarios in other areas, as public computers and so on.
One thing I agree is - "kitchen PC" + touch screen = messy no-no 😀
Anyway... I'm all for this. If you want it you have an option. If you don't just keep using your ordinary display and mouse/kbd. Nothing wrong with HAVING OPTIONS