Macs are a lot more solidly-built than they used to be, but there are a few of things still keeping them from being competitive with Thinkpads. 0) They don't try to compete on screen resolution. The 13-inch Macbook screen is only 800 pixels tall, which is fewer pixels than my phone. 1) They're quite heavy. In particular the 13-inch is only marginally lighter than the 15-inch. 2) The glossy screens make them unusable outdoors.

Perhaps if you mostly keep your laptop on your desk this wouldn't be a big deal, but it rules them out for people who like to move around.