As a few have hinted at, patents are issued for ideas that might get used either by the company themselves or someone else in the future. Think of this like when you brainstorm. The rule for brainstorming is that you don't censor ideas because even a crazy idea can become the jumping off point for a truly innovative, great idea.
Later on you look at those ideas critically and decide which actually make sense. That's all this is, an example of institutional brainstorming. And, if someone (Samsung) decides to implement something like this, then Apple can collect a small licensing fee.
If you've followed Apple at all, you know that there are many, many things that they have patented that have not and likely will not ever see the light of day.