I am writing these words on a new laptop computer that packs a full-size screen and keyboard into a body that’s quite thin and light. And it has a solid-state drive with no moving parts instead of a hard disk.
But this isn’t the much-touted Apple MacBook Air, introduced last month with all those qualities. Instead, it’s a new ThinkPad from Lenovo, the X300. While the two machines are both impressive products, they are different in key respects.