When I first laid eyes on Huawei’s MateBook X, I was smitten. Lust at first sight. This Windows 10 laptop wastes no space around its 13-inch screen and full-width keyboard. It weighs almost nothing, and is barely thick enough to fit a headphone jack. If beauty is defined by efficiency, which I think it is, then the MateBook X is the most beautiful computer I’ve seen this year.