It's kind of complicated than that. It doesn't necessarily convey that Apple is overtaking the computer industry. When looked at overall it's still going to be nowhere near dominating. Since there are major giants in the PC industry, among the competitors, Dell, HP, Toshiba, Acer, etc... the total revenue is being split.
I would agree that apple products are gaining popularity though, which in turn is causing a boost for the company. The thing is, that is only as of recently - can they hold up? That's what the market will decide.
