It’s the latest in a series of homogenising inventions - the printing press, radio, television, the internet - that will probably result in people of the future speaking and thinking more similarly than today. First went minor languages, then dialects, now regional differences within languages. Next will probably be the difference between different English accents - I think by 2100 English speakers will all be speaking with a generically American accent no matter where they are on earth. Then next will probably be other national languages - 90% of Swedes and Dutch people already speak English.