What is the fastest, powerfulest, thinnest, lightest laptop available?

Hi,
I am wondering has laptop technology reached the point where a super-powerful laptop is also thin, light, and portable (with little to no compromising between power and lightness)?

For example, I suppose I'm looking for something as powerful as an alienware notebook, but as light and nimble as a macbook air.

The closest thing I could find is the new Asus Zenbook , but are there any others? And how well does Zenbook fit the power+lightness description. Or maybe technology has not reached what I am describing?

ultrabook