The kitsch element is still there -- basically, this is the story of what it's like to be turned into a kill-or-be-killed videogame icon -- but the director, Joseph Kosinski, stages the extreme fighting with a fleet and threatening charge.

CNN: 'TRON: Legacy' makes novelty look cool

When fully dedicated to missile defence, some ships already devote 40% of their power to electrical systems, says Rear-Admiral Philip Cullom, in charge of the navy's fleet readiness.

ECONOMIST: Monitor

Initially, the majority of private owners are likely to be suburbanites, who will charge their cars overnight using domestic sockets, or fleet operators with predictable journey patterns.

ECONOMIST: Renault's electric-car gamble