Does Live Preview allow one to zoom in and see levels of resolution (and
therefore "focus") beyond what the human eye can achieve?  If so, that's
cool.  If not, I don't understand it.

Who is upset?

I still shudder when I remember trying to focus on the Eskimo nebula,
from the suburbs, via a 12" scope, coupled to a P&S with a TINY
electronic viewfinder with about 134,000 pixels.  But, because of the
enhancement possible with live view, you could at least see the
object.  Now, with high rez LCDs, things are better still.

Because it's our nature.

 There are things deserving of complaint :

[Original translation:]

[New translation:]

[Original translation:]

[New translation:]

I wonder why you are green alien from Mars with long
eyestalks?

What, you are not an alien?  Funny that, I've had the same
reaction over your question.

-Wolfgang

There are people who don't like it? Personally, I can think of all
kinds of uses for it, especially on a tripod. However, using it to
take most photos simply means that you will not be able to hold the
camera steady and your pictures will be blurred.

Hi Moonstarer!
I am not upset personally nor do I think it's an upsetting matter. However I
find that the LCD is not convenient in the sun most of the time. I would
rather have an eyepiece to look into.
I used to have a Canon Pro 1 which provided an eyepiece that was very usable
on top of the LCD. I found myself using the eyepiece only ;-)))
Marcel

If you have used a high end EVF camera then you can appreciate the benefits
and problems of the EVF.
The current technology for small screen displays does not approach the
quality level of an optical through the lens viewing system.
That probably will change but for the immediate future it is a fact.
Right now it is nearly impossible to judge critical focus or to evaluate
highlight and shadow detail on the best small displays because of their
truncated resolution and color depth.
This was a major problem with otherwise capable machines like the late Sony
828. I held out using one of these but it just could not compete with a
dSLR, and the issue had nothing to do with sensor size.
If the world goes to paperless viewing of photographic prints then the EVF
will be a distinct advantage as it will have most of the qualities of the
final processed image.
However if one's end aim is a paper based print the task of previsualization
will be more difficult if one has only an EVF with which to create the
image.