It's plausible that the computer would be in focus at that location as it is at the same distance from the camera as the main subject in the picture (and therefore shares the focus plane).
The transition is too hard though, and the screen illumination is ridiculous.
When I look at my screen, only a part of it is in focus. The computer doesn't need to know where I'm looking; my eyes are blurring those other bits for me.
Re (1), the guy in the video gives a couple demonstrations of focusing everything in an image. It seems reasonable to assume it could be automated, if that's what you're asking.
And for what it's worth, the just-one-design thing has worked out pretty well for Apple.
I'm guessing the issue is that there would be few
(1?) focus points available; people are used to much finer grained auto-focus capabilities. That being said...maybe uBeam can find a use for their tech now :-)
The transition is too hard though, and the screen illumination is ridiculous.
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