I have one of the Lenovo Yoga convertible laptops. I don't use the touch screen all the time, it still has a trackpad so you don't have to reach up to touch the screen to close apps. Alt+f4 also still works fine.
But I have been using it more and more, and always found working in IT on peoples machines, laptops always come in with many fingerprints on the screen anyway. If people are touching it, might as well make those touches able to do something. More input methods rarely is a bad thing since it gives people choices, and developers more flexibility in how they make their apps work.
