I believe many people reading this thread would have already seen first-hand the capability of new technologies to disrupt existing power structures and they'd have no problem extrapolating to present-future scenarios.

As powerful as the four-horsemen might now have become, they'll surely become past-their-prime IBMs or Microsofts in subsequent generations.

In this context, a responsibility of technologists is to provide another round of disruption - sooner than the last - in order to prevent incumbents from getting too entrenched.