Fancy an ultra-thin laptop? The first of the ultrabooks have arrived and we’re taking a look at them.

Acer’s Aspire S3 and the Asus ZenBook UX31 are here, both ridiculously thin, light and encased in metal.

This is one of those very big unboxings as we take a look at two laptops, even going so far as putting them side-by-side and comparing the sizes.

From the first look, it appears that Asus has the edge, with a thinner edge from the side as it slopes down. Both laptops are pretty thin, though, and when you open them, it’s a pretty impressive sight to see Windows PCs this thin.

The Acer Aspire S3 (left) versus the Asus ZenBook UX31 (right).

We’ll have more on both of these laptops shortly.