BBC has an occasional news segment entitled News 2050. This one caught my eye, as the headline was metric:
http://www.bbc.com/future/story/20130327-news-2050-10000m-tower-opens Indeed, they do a nice job with the 10,000 meter height, no feet equivalents and an appropriate comparison to Mt. Everest is made. Shortly after, though, they drop the ball an state that the tower can witstand winds of 180mph velocity. Oh well. Remek
