I'm unconvinced that it was a single person revolution, as there were several bassists that emerged at the same time that were all pushing the boundaries. It looks like a change that was already happening, and part of that is probably the evolution of technology such that outside of DB playing solo virtuosity could be heard.
I don't think that's true either. The Beatles were born from skiffle and rock and roll, and took it further, but with a lot of covers early on, and influences that also included The Ventures (according to Harrison), the Beach Boys (according to McCartney) and Motown (according to Lennon).
And it's hard to know what the effect is on the status quo from here as we are partly basing it on who has been the winner of the long-term publicity contest. As an extreme example Jane Austen wasn't considered an important author in her own time and only became so in the 20th century. You cannot assume from Austen's current popularity that she was influential at the time. So determining the effect of The Beatles on the status quo you have to research the impact on contemporaneous records and disambiguate the other cultural trends of the period.