The speaker would have been a small, rectangular speaker that, when connected to an iPhone via MagSafe, would have automatically played audio.
Sonos' scrapped MagSafe speaker would have had trouble finding a target market An AI-generated image of a speaker attached to an iPhone.
Sonos allegedly toyed around with making a speaker that would use MagSafe to attach to the back of an iPhone, but couldn't seem to nail down a target audience.
Beyond that, it doesn't seem like many people would have a need for a tiny speaker that snapped to the back of their phone.
Given the market and a decade of patents, it's no surprise that Apple is experimenting with foldable displays that would be used in a future iPhone Fold, iPad, or Mac.