Judging by the Apple marketing page, touch is used for (1) scroll; (2) zoom; (3) draw. I hope that’s all the ways touch can be used. It’s a bad idea to expect touch to be used instead of the cursor to click on buttons.

Do you really think Apple would make a product advertising a touch screen where you aren't able to actually touch buttons on the screen?

The marketing material shows a person playing a virtual piano with their fingers..

I was hoping that specific apps would need to opt in to accepting touch input such as the virtual piano. By default all the NSButtons won’t.