Linux in the skies

I was traveling from Karachi to Lahore on a PIA flight and just after take off the on seat screens started to flicker and got shut. Now, traveling on a PIA flight, you would expect that to happen, however the interesting part in this one was that during the rebooting of the system, I saw that the operating system behind all the entertainment application is Linux. hmm.. pretty intresting.. it also makes a lot of business sense as its freee and customizable as per requirement.