It's clearly not as versitile to you or I because we're obviously interested enough in this stuff to read Planet Game Cube and write forum posts about it.
But does the average EA buying gamer in the street really care? After all it looks like one of the major perceived advantages of the Rev remote outside Japan is the ability to improve FPS's and, frankly, a light gun would go a long way towards improving the experience compared to a typical console analog stick. It only takes Sony or MS to release something like this, nicely styled and supported by something like Halo, a few astroturfer raves saying it's just like, or even better than the Revmote and people will eat it up :-(