When I got the Optimus Black in the mail today from Korea, I thought LG had gotten mixed up and sent me a laptop instead. The box was bigger and weighed more than any phone package I’ve seen before.

LG's new gram laptop is a stunning device. After only a few minutes with it, I was impressed. Weighing in at just 2.4 pounds, it includes an eighth-generation Intel Core i7 U-series processor. That's ...