Machined aluminum construction means the XPS 13 is precision-cut from a single block of aluminum for a sturdy, durable chassis.

The keyboard picture there...

http://i.dell.com/sites/imagecontent/products/PublishingImag...

...also looks very similar to that of the old plastic-bodied black Macbook:

http://old.javconcepts.com/modules/blog/media/4/keyboard.jpg