Your next SMS will probably be around longer, and remain more legible, than your tombstone. For, unlike your tombstone or even your mortal coil, your texts may be worth something.

Part of an icon's power comes from its indivisibility. The swoosh cannot be further deconstructed into its component parts. Just as golden arches mean McDonald's, and the little red tab means Levi's, the swoosh is Nike. The product is its icon, inseparably and without exception. To buy a pair of Nike shoes is to buy the Nike swoosh.

Social media is itself as temporary as any social gathering, nightclub or party. It's the people that matter, not the venue. So when the trend leaders of one social niche or another decide the place everyone is socializing has lost its luster or, more important, its exclusivity, they move on to the next one, taking their followers with them.

One argument against open systems is that they become open to everything, good and bad. Like a Richard Meier skyscraper, the anal retentive, Bauhaus elegance of the Mac does prevent the loose ends and confusion of a less sterile environment. But it also prevents fertility. Apple's development must come from within.

Our fear of technology is really a fear of empowerment. We now have the ability to design the reality we live in, and we have to step up to the occasion.

With the DVR, I was mostly writing about it as a good thing in giving us the choice of when and how to watch things. But there's what we lose in the bargain, which is the collective spectacle. 'Did you see Jay Leno last night?'

What makes a great standalone piece of hardware is not the same thing as what makes a great networking device. One can work as an essentially closed system. The other is absolutely dependent on its openness.