This looks almost perfect (it lacks OS X). http://store.sony.com/webapp/wcs/st...10151&langId=-1&productId=8198552921666566155
Too small, apple already has a 11" laptop, adding a more expensive "pro" version with a retina screen doesn't seem to make sense to me.
Making the 11" Air Full HD (retina), and changing the design to the more beautiful rMBP design seems nice to me. I also wouldn't say "no" to touch-screen and stylus support.