I for one do not think it is gone. Just look at bamboo's status as a rod material. While many people ruled it out as a rod material many years ago, there are some who are very devoted to it
The uses of fiberglass that will survive IMHO are for relatively short, slower action rods. One of my projects for the winter is a fiberglass 3 wt rod. This will be used for those small streams where a 20' cast is a long one.
Rods now available that I know of are the Lamiglas bushcreek series, and Fenwick has a series of rods that are in some of the mail order catalogs.