All the features on the projected warship Brutus are actual fact and not science fiction, as he says
The railgun exists, however work has slowed somewhat lately …although it does work, they are apparently experiencing severe wear on the barrel/launch rail and this is a BIG problem, but nothing a bit of hi-tec grease will not cure. The MOD are building something called Dragonfire, a 50Kw laser weapon, which should be demonstrated next year, and indeed the Americans have lesser power ones as trial fits on several ships at the moment.
The Russians have (supposedly) got V V high speed underwater weapons using the bubble thing, and there are several different sorts of electromagnetic and micro wave devices also in trail or in design. One from BAe looks a bit like a small flat radar array but produces microwaves to destroy things, likely close range.
Not up on the propulsion but who knows? fuel cells are currently being developed/have been developed, and just look at the advances in battery technology in recent years..driven, some say, by the need to power the new generations of mobile devices (boats, obviously). I would have thought that special sails on carbon fibre masts would be pretty invisible to radar??
I am not sure the navy will get all this cutting edge stuff, all we will get is what's cheap, and selected 10 years late….then delayed for `budgetary` reasons as per the Astute boats, over budget some say mostly because the MOD wanted the various build costs to fall within certain financial years.
Ashley