Thank you for highlighting Rick Dickinson [1], it's probable very difficult to communicate to newer generations how form factor or plain aesthetics played in the 80s where a desktop PC is just a box. This clearly include calculators like the HPs ones. For the ones with sensitive clear memories, touching and using this devices make an echo in your spirit. Even when you think that the ZX81 had a membrane keyboard, there was something "mystic" about finding devices with such different design. We might even use the "kinky" term for devices like the Casio CZ-101 [2].
The Show Must Go On [3].
[0] https://en.wikipedia.org/wiki/HP-15C
[1] https://en.wikipedia.org/wiki/Rick_Dickinson
[2] http://weltenschule.de/TableHooters/Casio_KX-101.html
[3] https://en.wikipedia.org/wiki/The_Show_Must_Go_On_(Queen_son...
Talking about design, some of the Nintendo Game & Watch series were particularly lovely. It's the first "computer device" I can think of which was elegant.
https://www.flickr.com/photos/keithmidson/8082061808/in/phot...
https://uk.pinterest.com/pin/mickey-mouse-game-watch-nintend...
On a side note, I think one of the most iconic manual cover for a computer is the ZX81 one. Designed by John Harris, it's a masterpiece. I think he designed the Spectrum manual too but it was not so great.
We had beautiful computers at the time. I would say, in order of appearance, the Atari VCS, the ZX81, the Spectrum, the Commodore C128 and the Amiga 500 (inspired by the C128), the Apple IIc Plus. The original Macintosh eventually. It was just like having a piece of art at home.
The Spectrum Next, still designed by Rick, is beautiful too.
What are its appropriate uses? The more I program the fewer I see.