That's what I love about Animoog. It looks physical, but there would be almost no way to recreate it in a physical form and keep it affordable. The closest thing I can think of would be like a very long kaossilator for the "key bed" (with an embedded custom-made screen underneath to show the key spacing), and an iPad-like-thing for the main screen. Once you add in all the knobs, it would probably cost as much as most houses.
They took the iPad's essential trade-off (a highly responsive multitouch surface AT&T he expense of any physical buttons) and just ran with it.
And now I also need 300 bucks. Excuse me while I rummage around my basement for something to eBay.