I got the same impression from this alien video, and that's a similar implementation as in the HR derby in MLB11 (which I was not excited about).
But I'm a bit confused now because one of the preview mentioned that the swing speed (of the Move controller) affected the swing speed in game.
I was thinking the bat would move like the pad in Table Tennis in Sports Champions, and I think it is going to be a better system for baseball swing... But we will find out more how exactly this thing work...