Just found this article from '82 that mentions the KV-3000 and its $10k price tag, the Watchman and some other Sony innovations of the era... pretty cool!
"Sony Fair"
They also mention the Profeel series and how they are showcased connected with a VCR, LD player and computer. That computer would be the
Sony SMC-70. I used to have one. It is made to plug into the RGB connector on the Profeels (and 20/25XBRs as well). They also made an SMC-70G with genlock unit, so that it could overlay computer video onto NTSC composite video. I also never had any software for the SMC-70 so I couldn't do much except watch the cursor blink. I traded it for a Mac 512k with software, in the mid 90s.