Hot new trends in cycling

In the last two weeks I've seen three different young guys riding round in a permanent wheelie position, only dropping their front wheel when they have to stop. I reckon by Christmas they'll be riding round with no front wheels on, given the natural human tendency to take any new trend as far as it will go (cf arse-hanging-out-of-trousers look).
Any other notable developments in street-level cycling fashion?

Are you predicting the advent of the unicycle? Or perhaps the front fork will end in a skid like a helicopter's. Or maybe an elephant's foot?