The death of the cassette from 1994 Studio Sound Magazine, some interesting observations in this article.
Since Watchmans were kind of grouped in with Walkmans, here's some more TV stuff from 1982. Sinclair was so close with Microvision but when the Sony Watchman came out it dominated the market over here.
Radio Electronics 1991 from Archive.org Sadly neither DCC or MiniDisc had a big footprint in the US, I would have loved MD but they were very expensive and there was talk that you couldn't just record a mix disc and take it with you like cassette.
It's getting harder to remember what I posted, hopefully most of this is new, feel free to post anything related! From Stereo Review, 1988 10 cool portable CD players back when they were still really good looking.
The Sony D-5 from New York Magazine 1984 with some interesting information on using it as a data drive for computers.