Paris stamps - Visions of future flying
Ken Akins furnished a link to a web page that is very interesting. A set of 19th century postcards shows what French artists thought we'd be doing at the turn of the 21st century. These were produced between 1899 and 1910, and some of the portraits aren't too far off the mark.
Postcard number 12 (below) is a portrait showing what France’s air force was predicted to look like in the year 2000. The flying machines portrayed by the artist don't differ greatly from Micajah Clark Dyer’s 1874 patent drawings.