To an extent, but then you're stuck waiting for it to boot up or wake from sleep when you get in your car. The Beagle is the sort of thing you could attach a small battery to and expect to stay alive while the vehicle is turned off. That way it comes instantly to life when you turn on your car and power up the LCD.
For me the aversion comes from the fact it won't wake itself up to receive a SIP/Skype call, an IM or email message (basically battery life), and the pocketability factor.