Saw it a few minutes ago and I must say I'm rather impressed. Of course, what we saw was a cutscene and that crazy dude wasn't really controlling the sword that way (I don't think?)
With no online, I'm only hoping that the single-player is very good.
3DS FC: 1306 6473 7511
Nintendod Network ID: xsorenx
Add me for Pokemon, New Leaf, and Fire Emblem, Mario Kart 8.