I would love to see different key arrangements connected to regular hammers and strings, allowing for a wider span for each hand, opening a new era of virtuosism. Something akin to the buttons of a chromatic accordion [0], but with rectangular piano-like keys. We are used to the common arrangement of white and black keys centered around the major C scale, but this is just an arbitrary choice.
I don't see a word about novel designs that allow fitting the mechanisms that are normally spread along the keyboard, with ample room along and below each string and vertically moving parts, into the small hub of the spiral, with oblique and all different movement directions; making this thing sound as well as a vertical piano with similar strings should be considered wishful thinking.
Making those three rendered pedals do something seems also especially challenging.
In the sense that it doesn't use superconductors instead of strings, or some novel isomorphic layout, yes.
But, were it possible to actually be built, it still qualifies as a radical redesign -- just of the piano built, not of it's keyboard.