Yeah I saw the location test for that when I was in Japan in May.  I shoulda played it but was too shy (lulz).  Already takes enough courage to play Drummania XG and fail miserably in public -_-ll

That said, it looked really cool though I don't know how lasting the gameplay will be.  It was a trial unit though so I only saw people running through one stage and it was pretty small.  I'm not much of a fan of the FPS Japanese arcade machines myself, but counter-strike NEO and some other games had their day.