It looks like Porsche has kept up its promise of launching its swanky new 911 Carrera Cabriolet convertible by spring 2012. The Coupe was unveiled at the Detroit Auto Show recently and has some pretty spectacular specs on offer. It’s USP is the unique top mechanism that is much like a snuff-fitting canvas and carries rigid panels like a folding hardtop accompanied by fabric top. This ensures better security, noise control and great looks.