This is so kewl! I been hearing about this concept pretty much all me life, and someone has finally done it! Sort of...
The original idea/design was done back in the early 1900s. The technology just wasn't there to be able to make it work, but now it does. Be prepared to see a vehicle of some sort with the technology in it in our lifetime. I think it would be perfect in a boat first, meself.
 
Check it out!

The technical stuff might be a bit much for some, but it's just fascinating to me.

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Joel Adams  
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"