Well, at speed; ducted fans can move an aircraft sideways when hoveringnplus helicopters can utilise ground effect.
As for Roberts, he'll get shafted. Air paranoia is high, see what happens when you mention 'bomb' regardless of context. If people get wind of daily mail headlines of 'ipad hacks plabe to remote control engines' then we will be back to reading paperbacks again.
Biting the hand that feeds IT
