I don't think the vibe shift they're describing has fully taken place yet, but I think the foundations have been laid and it's started. It's probably going to be a while and take further societal changes to fully come into fruition, though.
Mind you, inconsiderate people will be as distracted as ever, and will continue to halfheartedly pretend they're listening to those around them. They'll just need to find a new method to achieve maximal obnoxiousness.
My money is on subvocalization.