Makers try things out. In the early days, phones couldn’t play music – you had to bring a Walkman or a CD player for that. But MP3 capabilities started appearing in phones in the 90s and they proved popular enough to stick around.
The same happened with cameras – they were once stand-alone devices, then some were phone add-ons, until finally the first camera phones started appearing on the market. Built-in music players and cameras proved to be winning features. But a built-in projector?
