This is going to bomb and going to bomb hard. Either consumers will never understand what the difference between the 3DS and the New 3DS are (especially on game purchases), or the people themselves will rebel over this 'new and improved' version and drop Nintendo.
It's kind of interesting actually, because this new 3DS model gives credence to Nintendo's very recent claims that they're going to stop focusing on casual players, considering them lost to cell phones and tablets. I don't think they're releasing this to sell to their traditional DS market, but are instead giving "hardcore" Nintendo fans something to play with. It's pointing towards a new direction for Nintendo, and one that could be very good for the kind of people who, well, frequent this kind of forum.
So in other words, I'm not so certain it's going to bomb. It's unlikely to sell in huge amounts to casual players, but it could lure in the core gamers while they're waiting for the next console release from Nintendo, and I suspect that this is Nintendo's intention. They probably don't expect to sell tens of millions of it.