It would make me nervous to fly in a plane without physical actuators. But maybe I'm old fashioned.
The 757/767 even has a pop-down turbine as a last resort.
Worst case, the power capacities of these systems needs to be beefed up. And like you hinted, flying a large plane without hydraulic power is practically impossible anyways. It's not a huge leap from that to plasma actuators.
> The technology could even replace traditional wing flaps, he says. Although the plasma-actuated “flapless” or “hingeless” wings are currently only suitable for smaller aircraft such as drones or UAVs, Erfani believes that further development could make the technology viable on larger, faster planes.