It’s hard to know when I can trust myself when it comes to applauding new Apple announcements, but I had that same familiar excitability come over me when Steve Jobs unveiled new PowerMac G5 desktop computers at Apple’s World Wide Developers Conference today. From the online images, these new machines look dead sexy — sleek, angular and forbiddingly cool. In a way, they remind me of the industrial design language that informed high-end stereo systems in the 1980s; I’ve also seen a few recent automobile dashboards modeled in this fashion. Maybe it’s time I broke out my stash of skinny ties.