I'd love to have 2cm extra bezel on one side so as it hold it better. Cover it with grippy texture (similar to Thinkpads) on the flange, thinner than the rest of the device (step-down from the edge of the display) and that would be a great device ergonomically. The grip flange can be thin and strong, may be 2mm think.
I wouldn't be opposed to iDevices being usable without cases, but they'd need to make them a hell of a lot tougher, then. If we've got to have a case anyway because the devices are too fragile, I prefer the strategy they usually use of minimizing device size and relying on the case to provide the in-hand ergonomics (texture, bulk, bezels, handles, integrated stands, those bump-out grip thingies—you choose which of those you want when you buy the case)