You put up with a lot when get on a plane. Airport security lines, expensive tickets, limited leg room, pretzel dinners, and burnt coffee. KLM Airlines is going to reward your patience. They are going to let you treat yourself like Donna Meagle starting in August when they introduce draft beer at 30,000 feet.
This wasn't a small feat. It's not just installing a tap, loading up a keg, and printing up Mile High Draft Club member cards (not a thing, but it should be). The decreased air pressure at altitude means that traditional taps won't function. It'd be all head and no beer. They note that pressurized taps could do the trick, but CO2 canisters are banned on airplanes. Taps that use air pressure are too big to fit in the catering cart that's already bruising elbows en route to tossing some peanuts your way.