Let's try it in action, but for now I presume it's more like an marketing thing than a practical need (I'm fine with usual fn keys). A thing which is supposed t

Let's try it in action, but for now I presume it's more like an marketing thing than a practical need (I'm fine with usual fn keys). A thing which is supposed to keep Apple to be named as an innovative company. Also will this "magic" work on Linux if I put it on a new Macbook?