Cyber Decks come in all shapes and sizes.
Cyber Decks are unusual and interesting and futuristic, or retro, or cyberpunk or steampunk.
People obviously love Cyber Decks.
Here's some examples of Cyber Decks:
https://www.google.com/search?q=%22cyber+deck%22+computer
There's a Reddit devoted to Cyber Decks:
https://www.reddit.com/r/cyberDeck/
There's videos of Cyber Decks:
https://www.youtube.com/results?search_query=cyber+deck+computer
BUT..... you can't buy anything like a cyber deck. Search Amazon, eBay, Google Shopping - nothing. Not one single company manufactures anything like a cyber deck, in any form at all.
All hardware manufacturers make is the same old rectangular boxes. There's a very small number of unusual shapes, including one pyramid. But for the most part even these "unusually shaped" cases are basically the same old design, pretty much a box with a motherboard in it, with unusual angles on the box.
Why is there so little innovation in computer design when the hobbyists are clearly showing what people like and are interested in?