I think the primary use case they are going for is fast/cheap access to sound libraries for keyboard players. Fast because they say you can switch without load times, cheap relative only to either a laptop or ipad (ignoring that these are multi-use devices) or some kind of big workstation keyboard, and cheap enough to not worry about it breaking in unruly venues. It gives the impression of being something more than just a sound bank device (with at least some user flexibility in mind, which is nice), but I don’t see it. Its longevity will depend on the quality of the libraries, but I wonder how likely big library producers are to take interest in it?
It’s definitely not for me, but then I don’t play keys in a bar or church or for a TV show, so I doubt they had me in mind when pitching it.