While this is a significant sum, to be sure, if an apples- to-apples comparison were made, the price of purchasing and operating modern fighter aircraft wings or aclass of surface ships or submarines would significantly exceed that associated with a ground-based NMD system.
Two pounds is still lighter than the Acer Iconia W700, which weighs 2.09 pounds, so for a product in this class, the Surface Pro might even pass for compact.