I also started a thread on foils a short while ago as the speed of the International Moth makes me very jealous.
I think some technology though is going to be very difficult to reproduce at consumer level eg you mention wanting wing sails but apart from them being rigid and impossible to transport, they also self destruct upon capsize!
The best sail technology we can hope for would be to copy Windsurfing and go for RAF (rotating asymmetrical foil) designs with camber inducers and carbon fibre masts.
eg: http://www.neilpryde.com/sails/racing/2 ... -evov.htmlhttp://www.tushingham.com/windsurfing/sails/x15
Look at cam technology at the bottom of this page: http://www.neilpryde.com/sails/racing/2 ... ew.html#d2
Although obviously for a Hobie you'd be looking at areas exceeding those.
That's pretty much what the International Moth now uses to great success.
The way forward I think with the Hobie 16 is a continued centreboard less design for ease of sailing, a new hull shape which is pitchpoling resistant, more powerful main sails and a Genoa instead of a jib (Q. could a genoa also be camber induced using short battens?), new light weight materials such as carbon fibreglass composite for the hulls as being explored by car manufacturers and pure carbon fibre for the boom, mast etc. to save weight and increase the power to weight ratio.
Personally I prefer a design without a spinnaker for ease of use for recreation, although I don't see why it couldn't be an option for racing.
For recreation, I like to see the set up kept as simple as possible and gains made through lightweight materials, better hull, better sail designs using camber and larger sail area.