Twitter has lost its position in the top 20 coolest brands for the first time in three years. So what makes something cool, and what's the next cool thing now Twitter's out?
We are increasingly comfortable with strangers sleeping in our beds, nibbling our leftovers, and taking our prized possessions for a spin. Growing numbers of us are willing to serve as bank, teacher or travel agent to people we have never met, and entrust them to serve us in turn.
Go to any provincial city in China -- small hayseed towns where the population barely nudges three million people -- and you'd be forgiven for thinking the national youth pastimes, after smoking, are online gaming and flirting.