Many major manufacturers have either already developed or (are) planning to offer devices with Linux. The only thing that is needed to encourage the evolution of Linux mobile is a critical mass of users.
There has also been an exploit for the Safari web browser, which makes it possible to launch a script and execute commands on the user's computer. It therefore seems clear that OS X may be fertile soil for security researchers.
This is not at all surprising as Linux is the most popular Unix-type system.
Slowly but surely Linux is being chosen over Windows not only for servers, but also for desktops.