It reminds me that we don't see "floating" touchscreens anymore.

The Galaxy S5, and probably other phones had this feature where you could actually trigger hover targets by hovering your finger above the screen. I just tried it on my Galaxy S5 the linked page and it works flawlessly.

It may be one of the gimmicks Samsung loved to put in their phones at the time, but as we can see, it is not completely useless. And it also doesn't look like there is any downside to it, except maybe a very small increase in price.