I can't actually think of a suitable contemporary equivalent to the Hattori Seiko Co. Wrist Computer, which hit the market in 1984, but I suppose at a time when most personal computers were gigantic, and USB flash drives weren't in use, having a mini "wrist computer" could be quite helpful.
Apparently, you could type on the Seiko keyboard and use the mini screen of the watch as a monitor. While the practicality of such a chore seems questionable, it's safe to say the modern wrist computer isn't much better.
My issues with this product include: 1. Why would anyone need a wrist computer? 2. Why would anyone want a wrist computer? 3. Why would anyone buy a wrist computer?
For a gallery of more shockingly retro images,