Will jetpacks ever become a viable means of transport?

This week's Question: Dubai's civil defence force has agreed to a deal with Martin Aircraft, the New Zealand-based creator of a single-person jetpacks. Dubai has announced an initial order for up to 20 Martin jetpacks, plus simulators and a training package, for delivery next year. Lt Col Ali Hassan Almutawa, director of the Dubai Civil Defence Operations Department, told the BBC that the packs would be used for first-responder roles, including reconnaissance and rescue. Some critics, however, say it will be a long time before jetpacks are quiet enough, and fuel-efficient enough, to make them practical for general use. What do you think?