Real ruggedized laptops, e.g. those sold by Panasonic or Dell, look very different. It's like the glass-versus-plastic question in phone screens. Glass looks nice, and withstands day-to-day abrasion better. But the stress necessary to shatter glass is way less than that of plastic.
Glass and aluminum are ruggedized materials?
But "undisputed leader"? No there are plenty of more rugged devices used in construction, the military etc.
They're machines that hold up well in backpacks, but hearing "rugged" used to describe them is funny when a cup of coffee could decommission the whole thing in seconds.