I believe that look will be the design Apple goes for with the 2012 MacBook Pro updates. I believe it will be similar width to the MBA, and will use a combination of Liquid Metal and Carbon Fiber for the case. I suspect this look is about what Apple will shoot for, as they need to move beyond aluminum in the sense of design and reducing weight.
There have been plenty of reports of carbon fiber and Liquid Metal uses in future Apple products, and the MBP needs the performance of the MBP with the weight and thinness of the MBA... and the MBA needs to use the 11 case and add a 13" LCD in it to basically eliminate the bezel. Footprint needs to be reduced next to show off the MBA's superiority in mobility and the bezels are currently absurd!
BTW, I love both products you're using with the MBA. Looks great! How much weight does the leather skin add? Does it offer much protection in the case of drops or is it really just scratch resistance protection?