>futuristic
Presumably through Vortex'[0] similarity to the Symbolics PN 365407[1][2] keyboard, with its very distinctive design that manages to capture at once both futurism and timelessness.
Disregard the 2020's clunky cherry switch keyboards, acquire the OG Best Keyboard.
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[0] https://mechanicalkeyboards.com/shop/images/products/large_V...
[1] http://xahlee.info/kbd/symbolics_keyboard_pn_365407.html
[2] http://coder.zoomquiet.top/data/20130716102310/index.html
I believe you are right on spot with that - the minimalism, of the keyboard, case and the Plan 9 UI evoke some sort of timelessness, the same way a Connection Machine still looks futuristic today.
As for me this keyboard doesn't seem futuristic at all. It reminds me of the first computer I experienced in my life.[1]
I mean, it is lovely keyboard, I really like it. Just "futuristic" is a strange way to describe it. It would be even more nice, if some keys of bright colors were added. Like in MK-61[2]. Though photo in wikipedia doesn't capture it (or maybe my memory is wrong), but those blue key was of a so beautiful shade, I really loved it in my childhood and was eager to learn how to use MK-61 just for a joy of using this very key. Yellow and red keys were also likeable but not so much, moreover the function of red key was trivial and I lost interest to it very quickly. But the blue key was beautiful and mysterious... My first love. Maybe I became a programmer due to color of this key.
[1] https://en.wikipedia.org/wiki/Electronika_BK
[2] https://en.wikipedia.org/wiki/Elektronika_MK-61