I agree that having bootstrap as a common standard is doing more good than harm. However bootstrap is tied much more to design esthetics than interfaces.

With that being said, website designs have defiantly shown trends over the years (as have operating system "themes"). So I think we'll see something else come along to replace the bootstrap eventually according to the "standards" of the next greatest design phase.

Note Bootstrap does make a solid case for using standard components such as LESS, CSS and jQuery.