The newest PlayStation - the PS4 has a new graphical users interface (GUI). You're going to have to get to know it to get most use of your console, unless you're getting an Xbox One of course, in which case feel free to snipe in the comments below.
Annnnny-ho, we've got a nearly 10 minute video here that's going to take you through the new GUI in a deeply informative manner. Bottom line - it makes things easier to buy from the PSN Store... no really, there is more. Watch. Also, it might be us but does that chap look like John Terry?