I assume that you do not have a Surface RT? Something power drains the battery if you leave it in sleep or standby mode. Reviews have shown that even with a battery 3 times larger than the new iPad, it still only gets half the standby time. Several times I have left my Surface for a few days unplugged (which you should be able to do like an iPad) only to come back to a completely dead battery. So yes, in my opinion it is necessary to be able to locate and use the shutdown option in Windows RT.