The Ford SynUS:


Will cover the windows with what looks like a metal, motorized 'window shade', seats are bi-directional, and it has a big screen in place of the rear window.
http://www.seriouswheels.com/top-200...us-Concept.htm



The Lexus LGA:


Said it's gonna be 500hp.
http://www.lexus.com/about/concept/lf-a.html



The VW Ragster:


It looks wider, and the roof is obviously chopped, but they I didn't hear anything in the way of performance.
http://www.vwvortex.com/gallery/gall...tle%20Ragster#

There was one more but I can't remember which it was.