On net.general today, an odd thing is described in a post titled "digital audio":

"SONY AND PHILIPS AGREE TO DIGITAL AUDIO PLAYBACK FORMAT"

"information encoded on a 4.7 inch diameter disk"

"16 bit PCM"

"$600 range"

"Recording time is one hour per side"

An also-ran technology also mentioned in the post is interesting too. It is sort of a flash drive without the flash memory, instead using some kind of film.