Keyboard of the Future?

I don't know how practical it is, but this certainly looks cool. Watch the video to see what I mean:

Here’s an experimental musical keyboard by Israeli industrial designer Eitan Shefer, which is a MIDI controller based on relativity. The Samchillian keyboard takes a novel approach to a musical instrument, where you play music not as specific notes but select how they relate to the ones before them. For example, if you’re playing a C and then want to play a D, you just push the +1 key. There are two directional keys, 16 keys and eight finger positions, and when you want to bend the pitch or manipulate the filters, you tilt the unit from side-to-side. It’s also customizable for large or small hands. Check out the beautifully-produced video, and you’ll quickly understand how it works. Wonder how difficult it is to learn?

You can read more about it here.