Its beneficial. The reality is neither competitor came through with a wii mote clone this year and Nintendo keeping secrets is the best way to prevent theft. I am sure it won't take too long to change in game physics on releases coming almost a year from now. They might even rush Wii Sports 2 ensuring all developers who are ready will have the tech available, or maybe they will include the attachment in other games prior to this.
“When we make some new announcement and if there is no positive initial reaction from the market, I try to think of it as a good sign because that can be interpreted as people reacting to something groundbreaking. ...if the employees were always minding themselves to do whatever the market is requiring at any moment, and if they were always focusing on something we can sell right now for the short term, it would be very limiting. We are trying to think outside the box.” - Satoru Iwata - This is why corporate multinationals will never truly understand, or risk doing, what Nintendo does.
