Well, maybe Apple isn't the top dog in the field—which is a good thing, as I may have mentioned before!—but the image above is evidence that even Russians, paranoid as they are, trust Apple enough to allow them to sit on the desk of the Russian President. I doubt you'd find a Windows-based PC there.
Of course, it could also be a plain symbol of status; of someone advertising that they have taste and are someone of discernment. I'm not saying that Dmitry Medvedev actually is such a man, but the fact that he should choose to let it be known that he's a 'Mac' guy, tells us something.
Oh, yes, for completeness' sake, there is, of course a third possibility: that it's just Schleichwerbung (paid for or not; who knows and who cares?).