Is it possible that technological progress isn't linear?

Seems to me that much of the technological advances have resulted from the major physics insights. Physics hasn't really had major new insights since the early 20th century. That's probably because we now fundamentally understand the workings of our universe. There are no new fundamental mechanisms. These fundamental mechanisms are the tools that can be used in technology. My contention is that since there are no new tools available, and haven't been for a long time now, and so this has resulted in a "saturation" in the technology innovation curve. The technological innovations, the new technologies that are possible will not be steadily increasing. At some point there will be no more new technologies.