Ah, okay, it's the not touching thing? Yeah, that is something that is unique to this instrument. It has to do with the way it's designed -- you control it by making small changes in electromagnetic waves around it. By its very nature, you can't touch it.
By the way, it's not digital -- it was invented back in 1919. It's only very recently that they've been able to add sufficient tracking to use it as a MIDI controller, but it's still mostly played in the analog realm.