Originally Posted by Virgil-TB2
Typing on an iPhone (or any similar device) by laying it on the table and typing like it's a mini-typewriter is ridiculously inefficient. If you are using your iPhone this way you are "doing it wrong" as they say.
Something in a similar aspect ratio to an iPhone (a reasonable assumption after all), would be rather easy
to thumb type on and rather difficult
to type on the way you suggest. I would predict that as a "media tablet" it would have a way of propping itself up or sit in a dock that performs a similar function. Bluetooth keyboards (Apple's is already in the same kind of form factor), would be the most obvious solution for those that insist on typing the "old-fashioned" way.
More importantly, a tablet that you *can't hold in one hand comfortably, would rule out half of the uses that a tablet could be used for and a tablet that *must* be put on a table and typed on like an old typewriter would rule out a lot more uses. One of the central reasons that tablets haven't caught on so far is that they have to be held in the crook of ones arm (because they are so bulky and heavy) and then awkwardly poked at with a stylus held in the opposite hand.
I'm an engineer, so I guess I overlooked the fact that some people wouldn't be able to visualize this. You can thumb type on the iphone because your fingers extend beyond the iphones center of mass. As you scale up to a device with an 10" screen, this may not be the case anymore.
To visualize this, grab your iPhone (or anything of a similar shape and size) and hold it as you would if you were typing and note where your fingers are on the back of the device (they are probably at least halfway up). Now move your fingers so they are no more than a third of the way up the device and try to keep it in your hand without placing any pressure on the front of the device from your thumbs. You can't. If you take the pressure off the front, your device will flip out of your hands and smash into the floor.*
Now maybe Apple could make the device very bottom heavy to offset this, although I don't think that would meet their design standards as it would feel weird in landscape mode. Without having this tablet in my hands, I can't say for sure, but I don't think thumb typing will be a reasonable option on a 10" tablet. On second thought, they could put the virtual keyboard in the center of the device, but that would be very strange.
Edit: Perhaps the pressure you add to the sides and top (edge) of the device with your palms would be sufficient to offset the moment generated by not holding the device past its center of mass, bit even so I doubt the tablet will be designed for thumb typing like the iPhone unless they did something like split the keyboard into right and left halves and move the keboard higher up on the screen. A tablet is just to big for thumb typing as we know it.
*I take no responsibility if you actually drop and break your iPhone.