[shinkansen]

> I am assuming the worst possible situation here. I do firmly believe that OS X will eventually be just like iOS...

This will never happen. As others have already stated, Apple would lose their developers and because they don't command the market with OS X they would never risk doing that. Let's not forget the professionals that use Macs: the design industry, the film industry, the music industry: these rely in some cases on third-party applications like the Adobe Suite, these industries are another reason why OS X cannot ever become iOS; they require a fundamentally open, extensible environment. Add that to the fact Apple has stated that the App Store will never be the only method through which developers may publish their applications to the OS X platform, and it just will not happen.

Your paranoia is irrational.