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I wouldn't take Shimano patent filings as any kind of guide to what they will actually produce, they are well known for patenting everything they think of as a protective policy just in case somebody else finds a way to bring the idea to the market in a profitable way which has escaped the Shimano production engineers.
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"developing a comprehensive strategy to produce"
"The smoking gun in Shimano's application can be found in the details. The abstract drawings depict a concept that is near production"
"Shimano's application also describes in detail, a special lubricating fluid... Does that sound speculative? I didn't get that impression either."
"this gearbox will eventually be scalable and thus appear at a number of price points. Conventional gearboxes are not - which is why the gearbox bike has never been moved into mass production."
https://www.pinkbike.com/news/shimano-gearbox-in-the-works-files-patents-on-hybrid-roller-chain-sequential-shifting-transmission.html?fbclid=IwAR3TX-_k_UnbMJXQGDFGxLdwQ2GEzZ6ekdnwai2mLuCf2gssoDv4xHYcqHA