Not really in practice though - to rephrase, you can only put it in a bag if it's shut down - how many people do that frequently other than to reboot for some reason? How many of those do it every time they put it in a bag? As if on your commute to work for example you're going to power on when you get on the train, shut down again when you get off, power on again when you get into the office, off again when you leave, ... (and if the job involves lots of client meetings, or presentations in another building..!)