A harpsichord is a lovely instrument and whilst not as high-tech and modern as a piano still has many fine pieces written for it. I suppose I have to accept Silmarunya's final sarcasm but you can still make great music on a harpsichord. And being able to roll it up does give it the edge on portability compared to an upright.
It looks like it could have a place with composers "in the field," without ready access to a piano/keyboard, especially if it recorded directly to the player. The lack of feedback or pedal options isn't a big loss in a situation like that, where you need to record your musical idea quickly before it's forgotten. Obviously, it's a niche idea, but not one without merit.