It is radically good-looking (for some tastes) but radically impractical, probably because it is a design exercise made without any particular interest or compe

It is radically good-looking (for some tastes) but radically impractical, probably because it is a design exercise made without any particular interest or competence for what makes a piano actually work well. 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.