I love reading Siracusa, and want to agree with him here, but this sentence stops me.
Apple clearly doesn't 'love' personal computers anymore. How much clearer could the signs be?
They took their engineers off Mac OS X and put them on iPhone OS. Their PC OS lagged and stagnated. The 'new' Mac Pro isn't the only insult to power users; OS X 10.8 itself is, too. It is the worst update in (Mac) OS X history, not only with serious show-stopping bugs, but also with new 'features' that are ground-breaking in how dumbed-down they are[1].
Their new love is closed, power-user-hostile, quasi-disposable consumer devices. Steve Jobs himself broke up with the personal computer in his last years, and the company followed suit.
[1]: LaunchPad, newly-crippled Expose, disabling extra monitors in fullscreen mode, double clicking hidden files doesn't open them, moron open-save dialogs, by-default iCloud file storage that prevents one app from being able to open another app's docs (even to attach as mail attachment), etc etc et