The first commercially available speaker using DSP came out in 1991. Change in the speaker industry over the last 20 years has been more evolutionary than revolutionary. However, the pace has increased due to increased capacity for modelling and evaluation of ideas, and the rapidly increasing rate at which knowledge spreads.
However, if the question is about the history of Monitor Audio, here's their version of it: https://www.monitoraudio.com/en/about-us/timeline/. A lot of it is model introductions, but there are plenty of references to incorporation of new (to MA) technologies.