Reminds me of that OLED keyboard ... Optimus I believe it was called ... I wonder if anything ever came of that, or if it's still vaporware.
the much cooler thing that came out of that project was the "mini 3": https://www.artlebedev.com/optimus/mini-three/
(side note - their website has possibly the best cookie disclosure on the internet)
The studio then released the full-size Maximus for $2068 using an OLED per key.
They later released the Popularis, originally intended as a cheaper sub-$1000 model using a single large OLED for all keys. They did end up releasing it but with various additional tradeoffs (a "compact" keyboard without a numpad) and at a fairly expensive $1086.
Concurrently, they released cut-down keypads with 6 and 15 keys, also at fairly expensive $376 and $534.