Uhmn...how about this here site/page?
[attachment=1886:Safari_Display.gif]
[attachment=1887:Reader_Display.gif]
As I understand it "Reader" is not a way to 'see the web' as much as a way to read 'articles' on a web page. Designers often use different tags/methods to display text in the way they want, but not necessarily the way the viewer wants. One person may want the text bigger. One person may not want to scroll sideways. Etc.
What Reader does is take what it recognizes as mainly the text on the page, headlines, sub0heads, body, even quotes and retains
some of the styling to help keep most of what the writer wanted for emphasis, but removes all the 'glitz', images, Flash, etc. At the same time, it increases the size of the text while placing it in a window that doesn't need horizontal scrolling (the bane of viewers with narrower screens or mobile devices or those who simply tire of l . o . n . g lines of text or stretched windows).
Notice the two images are both 800 pixels wide, but the Reader version is much easier to read, with my eyes, anyway.
It's rather like html email, in reverse. Do you want to read the message or look at all the styling?
I love it!
And I hadn't even tried it here! I first saw/used it at a site that used really small font sizes and had very little graphics, just a very long text article. Reader made it so much easier to read! And, if you don't want to use it, no problem! It only displays stuff when you ask it to.
It's not a always ON or always OFF feature. What's not to like?