When listing all the ways humanity is going to ruin the future, one that doesn't often come up is the sun being blocked out by a horde of drone advertising blimps. But that hasn't stopped one Swiss firm from working hard to make it a reality. Skye Aero is a project to build 3m helium-filled balloons, with small propellers attached to give better control than your average blimp. The benefits are a much bigger aircraft -- useful when you want to advertise to people -- and one that won't crash the second it loses power, or bumps into anyone.
It's not a totally new design -- British band Muse have been using a fleet of similar drones on their most recent tour -- but Swiss firm Aerotain's design stands out due to its soul-sucking practicality. The company thinks Aerotain will be a perfect, audience-engaging advertising platform, which is probably true, but a little too consumerist to get excited about.
Moving away from its role as a replacement for the Goodyear Blimp, lighter-than-air drones are an interesting and underutilised concept. Provided they're not filled with hydrogen, they offer increased safety for flying over crowds, and a much greater payload than traditional quadcopters. Hopefully, someone will find a better application for them than giant floating billboards.