The Infinity Blade or Minigore series, for example, or anything made by Illusion Labs. These games are genius and most consoles don't even have a touch screen or utilise it well like some smartphone games do.
Also why do people look at me weirdly 👀 when I play games on my phone in public while waiting for something?
But I enjoy those mobile-only games 😅 How would I play them otherwise? And I think touch interfaces allow for some gameplay you wouldn't ever get anywhere else, like swipe actions and multi-finger gestures, which you can see in games like Infinity Blade or Fruit Ninja (or even True Skate, which seems to have quite a following, not my fave personally but I can't imagine that on any other device)