Dell's latest 15-inch enthusiast laptop, the XPS 15z, is a pretty decent package. Its metal design is both stylish and conservative, and it has a good amount of power. There are many good, valid reasons for Dell to promote the XPS 15z, but one of them should not because it's the thinnest 15-inch laptop on the planet – because it isn't. Dell's advertisement for the XPX 15z reads: "Just 0.97" (24.68mm) at its thickest point, XPS 15z is the thinnest 15" PC on ...