I was just checking out another article in an old issue of Billboard, it looks like the boxes and personal players were starting to go downhill at this time but the Sony Solar did get a mention. There's some other articles on players and media as well. I think the special edition starts around page 61. https://books.google.com/books?id=-CMEAAAAMBAJ&printsec=frontcover&rview=1&lr=#v=onepage&q&f=false
"Stereo-to-go may be a relatively new concept, but it is no doubt one that will be around for a long time to come."
