You board an airplane and put your notebook in the overhead compartment. Then, you promptly fall asleep before take-off. In the meantime, someone places their hard-sided suitcase right on top of your notebook. If the LCD is not equipped to resist excessive shock or force, your notebook - and ultimately your career - may end up cracking under the pressure of a long flight.
A drop, a crunch or a bang can result in a cracked or broken LCD. On top of the time and cost of repair, you'll also be unable to make that big presentation to your prospective customers.
Every Toughbook features a full or partial magnesium case to assuring superior resistance to exterior effects like bumps, drops and knocks.