The dots and their future

Will technology make Braille obsolete as a primary reading tool for blind people? Will talking apps and audiobooks win out over embossed dots? It's possible, but Braille has been written off before; each time, it has come back stronger. We trace Braille from its beginnings in Napoleon's France, through the "War of the Dots" in the early 20th century to the age of the smart phone, and beyond.