The Future of Worship Music?

I once made a prediction that the most popular genres of corporate musical worship (classical music traditional and folk/pop rock) aren't going away for a very, very long time (maybe ever). This was based on the following assumptions:

1) Classical music traditional (e.g. Bach, Handel, Mozart, etc. with hymnody) has established itself in timelessness, already having survived the diverse explosion of musical genre in the 20th century.

2) Folk/pop rock music, while not necessarily the highest on the Billboard, functions better than most other popular contemporary genres (e.g. hip hop, rap, techno, dance) for teachable corporate singing.

3) With little to no exceptions, no major instruments and/or genres of music have recently been created or can be created in the near future that can have the same level of impact on corporate musical worship and the musical community in general as did the creations of the organ and the electric guitar.

But, after skimming this article on CNN, I'm starting to wonder if I'm wrong. Thoughts?