Today in 1915*, David Sarnoff, Chief Inspector for The Marconi Wireless Telegraph Company of America wrote to his superiors: “I have in mind a plan of development which will make radio a ‘household utility’ in the same sense as the piano or phonograph. The idea is to bring music into the home by wireless. The receiver can be designed in the form of a simple ‘Radio Music Box,’ placed on a table in the parlor or living room.”
*It is not clear whether this was indeed written in 1915, or 1916, or 1920, or even later. But it is clear that by 1916, Lee De Forest and others were broadcasting news and transmitting music over the wireless to multiple recipients.