I feel that glasses-free 3D is the future, but as others have said, it needs to improve its visual quality versus using the parallax shutter glasses. The alternative is that they find out how to make glasses-free 3D cheap, but who knows how long that will take or if it will ever happen.
As to the question asked at the end of the article, 3D is here to stay. Though I understand those that see it as a fad and could agree with them in the here and now sense, but I think they are using a different definition of fad from the one implicitly suggested in the article.