But the sharing stampede is nevertheless gathering pace. Zipcar has imitators in more than a thousand cities. Every week sees the birth of a business describing itself as the Netflix of this or that. Collective consumption is also disrupting established business models based on built-in obsolescence. The internet may be synonymous with novelty, but by encouraging people to reuse the same objects rather than buy new ones, it may revive the old virtue of building products that last.