I argue that Apple now has not one but two monopolies:
I) A nearly-total monopoly on computer (and pocket computer) systems designed with good taste. II) A total monopoly on the Microsoft-free, hassle-free personal computer. 
Mr. Jobs is indeed starting to behave like that other convicted monopolist we know and love. Yet unlike the latter, Jobs did not engage in underhanded business practices to create his monopolies. They were handed to him on a silver platter by the rest of the market, which insists on peddling either outright crap  or cheap imitations  of Apple’s aesthetic. In order to resist the temptation this worldwide herd of mindless junk-peddlers and imitators have placed before him, it would not be enough for Jobs to merely “not be evil.” He would have to be a saint (and a traitor to his shareholders.)
— Stanislav Datskovskiy puts it better than I ever could have, about Apple’s success.
If you’re used to GUI based apps, the idea of having to manually mount apps is likely to seem overly arcane, and something we should have stopped having to do back in the twentieth century.
But if you find yourself needing to do so sometimes like, when dealing with virtual machines on the commandline, or pared back systems like OpenWRT boxes, it’s worth bearing in mind that on Linux, you are able to mount a drive pretty much anywhere on the filesystem that’s in a directory (as long as you have the correct permissions to do so).
For example, in OS X, where you’d normally expect to find disks you insert on the desktop, or at
/Volumes/NameOfTheDriveif you’re looking at the path for it on the commandline.
On a Linux system, the default place for inserted drives would be either
/mnt depending on what flavour of linux you’re using. However, you’re able to mount on any path, that might be more convenient, like