That is handy but it is not the same thing. When you close the lid things are getting written to the hard rive. This means you shouldn't move it around until

That is handy but it is not the same thing. When you close the lid things are getting written to the hard rive. This means you shouldn't move it around until the light starts "breathing" or you risk data loss (afaik this doesn't apply with an SD drive however). With the iPad there is no startup/shutdown time.