not sure about sales and image, thats down to marketing, and if they are aggressive form day one, and get it into peoples heads just what the thing does, they could do very well for themselves.
i was always going to take this with a pinch of salt, for one, the design is not finalised, but the idea is amazing.
this is just an example/possible use of the controller, and how it could get me and my dad playing together; golf
now, if these sensors are in every point, so it can detect every twist and turn, imagine how cool that'd be playing golf? (and yes i do play, don't bash it:P) you could play any course, and while its still not like the real thing, it'll be close, and it would replicate your swing exactly.
there could of course be other options, from the swing determining the direction and power, to just flicking it in your hand while laying down.
and you could do it anyday, any time, without the walking (WOO)
this is just off the top of my head, think what a full dev team could do in games
i think nintendo have done themselves good this time, a little bit of work, get the thing out there and the devs working, it could really do something new and exciting for games
(and for anybody interested, what do you think of the golf idea? )