Who watches broadcasts? Seriously. My TV use is as alive as a Mexican flu pig. Broadcasts=CRAP.
First off, let me agree with that. I don't watch broadcasts. I don't have cable, either. The TV shows I watch are all downloaded or from DVD/etc, and most of them are older shows (not widescreen).
Furthermore, your list is quite agreeable as well. Most of those things would be better (or at least don't benefit much) from a widescreen.
That said...
-Movies: 2.35:1
WAY better on a widescreen. It's still got unused space at top and bottom, but far less than on a 4:3. I have a 21" CRT and a 22" LCD monitor, and I bring out my monitor for movies, because the picture ends up being much larger, even though the overall screen area is smaller. Also, not all movies are 2.35:1.
-90% of point and shoot camera photo's 4:3
-SLR camera's photo's 3:2
-typing in word: 1:SQR(2)
-websites/blogs 1:1-1:5
-skype videochat: 4:3
...
-e-books: 1:1.45
Not common TV applications. But I see your point. I would like to point out that I rotate my widescreen at work 90 degrees quite often for e-books, and it's much better if you're viewing one page at a time.
-console collection: 4:3
...
-A-team, Knightrider and other good classic shows: 4:3
Agreed. No benefit from widescreen.
-golden section: (1+SQR(5))/2:1 (nice on the eye estetically)
LOL...good one.

Actually, I have to point out that the golden ratio equates to about 1.61, which is rather close to 16:9 (1.77).
So WTGDF is the use of 16:9? Can anybody give a GOOD need for that complete abritrary aspect ratio for general LCD screen use?
Only three off the top of my head:
- Viewing 2 "letter-sized" pages at once (leaves a little extra space, which is usually taken up by other screen elements like scrollbars)
- Modern TV shows (HDTV, as I mentioned, is 16:9...and there are few good, current shows, believe it or not)
- Modern video games (also HD resolution)
The last two go back to my original point, as they are probably the most common uses for a TV among average consumers. They are the consumer needs driving manufacturers' decisions.
Putting it back into this forum's perspective...for many modern arcade games, widescreen is important. For most classic arcade gaming, 4:3 is preferable. I'm not arguing with that at all.