It's hard to get totally excited about a PC hardware peripheral, given the smaller quantity of games (particularly hardware-specific titles) over in desktop land, but with Valve support and what appears to be the perfect control scheme (dual analog sticks, dual fully 3D-sensing motion controllers), we'd say the Hydra has a better shot at winning us over than anything else of its ilk.
In order to stop flood waters overwhelming central London and to save the massive expense of building fresh flood walls and defences, some land could be set aside to act as a safety valve, catching flood waters and storing them until the danger has passed.