Really neat... but
That is a really nifty bit of tech and a great idea for keeping people out of harms way. I can't help but feel a bit of the South Park "took our jobs," mentality rearing its head with this though. That's a robotic/drone set up that will kill off window cleaning and painting jobs, especially in dangerous locations.
Though I do wonder how those drones would perform at extreme heights on skyscrapers, where the winds can be much stronger.