I'm not sure what is supposed to be noticed in the second video, but the first one is basically already possible with current tablets, other than the "everything is transparent".

I mean, there is no deep conceptual difference between something like leafsnap and what is shown there.

But even looking at that, it still doesn't show why a tablet form factor (thinking >9" diagonal) is better for this things than something sized like a larger phone, or a foldable thingy like the (sadly dead) MS Courier.