[Nextgrid]

The use-case of it could be to primarily listen and just glance occasionally, like an augmented radio. News and sports events could fit the bill for example - listen most of the time and take a look for 30 seconds when something interesting/relevant is mentioned.

[CodeBeater]

This is probably the primary use case. Although modified FM radio receivers could easily receive analog TV audio it just would be a harder sell.

Also, sometimes companies do things just to show off their capabilities to the market, especially Japanese companies. Sony were the kings of this tactics back in the day.

As a side note, in the typical western FM band allocation (88 - 108MHz), the analog TV audio carrier for channel 6 would be located just under that (at 87.7MHz), and since most radio receivers could go a little under and over that range, most people could listen to channel 6 audio on the go.

This generated an entire market of "TV" stations who's main purpose was to broadcast audio, in the United States they were nicknamed "Franken-FMs".

[martyvis]

One of the examples was showing a baseball match in progress. I imagine that would appeal to the Japanese "salary-man" where he could be commuting or even working and keeping up with what is happening out on the pitch.

[Stratoscope]

Ah, now that makes sense! I was picturing actually watching a full TV show, but what you describe is very practical.

[infogulch]

Maybe tiktok would have been invented sooner if a majority of people had screens strapped to their wrist.