Eigenlabs have in the past emphasised that the Alpha is really an instrument, and not just another synth controller, and I really think this is true. The wood finishes really make it look the part.
What really made me think of the alpha as an instrument is when I had the cello sound mapped onto the keyboard, and noticed odd noises when I picked it up from the stand. I thought something was broken for a while, but I was actually nudging a key on the edge of the keyboard, and at the same time brushing the strip controller that bows the cello, so it squeaked and creaked like a real instrument would if you nudged parts of it while moving it around.