Sebastiaan de With showcases laptop design before and after the unibody MacBook Pro and MacBook Air.
And since Sebastiaan posted this, Samsung has announced their [Series 5 and 7 Slates](http://www.theverge.com/2012/8/29/3276599/samsung-series-5-series-7-slate-windows-8), which looks a whole lot like a MacBook Air.