If the 'real problem' of the 3DS will come when the TV manufacturers releases mass market glassesless 3D TVs, then I would suggest that it is not a problem for the 3DS at all. It will be a problem for the next Nintendo handheld, because that's the kind of timeframe we're dealing with here.
Furthermore, saying that 3D on a small screen isn't all that and then saying that 3D smartphones will steal business from Nintendo is a self defeating argument.
Another great thread here.
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