Bump and fall proof, liquid proof, sand proof (and cat hairs proof I assume), extreme heat/cold proof, can be used as a blunt weapon in an emergency. Ridiculously overkill for anyone that's not a geologist working in Antarctica or an archaeologist in the Gobi desert, and ridiculously overkill is fun
ThinkPad W701DS. Depending on configuration it has an intergrated Wacom digitiser w/ pen, a built-in Pantone colorimeter, two RAIDed hard drives and of course the glorious second screen that pops out.