Sure, we can all think of an example of a musical technology fad. However, that doesn't mean that all new technology will fade away. It was quite some time before musicians accepted that music for the harpsichord could be adequately played on this newfangled instrument called the pianoforte or what we today call the piano.
For another example, check out Jimi Hendrix's guitar. That was a radical musical technology. Yet there are few today who would question the permanence of the electric guitar in the musical landscape or of Jimi Hendrix as among the world's greatest musicians.
All musical technology was once new. Even the string quartet. Even the piano. Some musical technologies will fade away, but others will weather the test of time, endure, and even be venerated by future generations.
The philosopher John Dewey stated that human art will always be superior to technological art. Presently, laptop ensembles and flashing bells and whistles are considered progressive and the future of music. However, if we look at the patch bay synthesizers of the 1960's and reel-to-reel music concrete, we can have a chuckle at the seriousness given to those old toys. The same laughs will be applied to our current sequencers and laptops in the future. In fact, piano rolls for player pianos were considered cutting edge from 1910 and on. A string quartet however, will still be a string quartet 100 years from now, and could still be appreciated as it is today.