I don't care if you are a programmer, photographer, writer, teacher, video editor, etc... Being mobile in this economy is the key...
Absolutely right.
That's why I replaced the casters on the compute rack with ATV tires - hook that baby with it's 4Ux1 and 1Ux4 rack computers, 1/10GbE switch and UPS up to the tow ball on the back of my F-150 and we're totally mobile, ready to roll.