How about this then:
http://www.positioniseverything.net/articles/jello-expo.html
It works well for the normal computer monitors 800px, 1024px and even 1280px wide monitors at 72dpi or 96dpi.
It is what happens when you try and view them on a WXGA 15.4" screens which are 1680 pixels wide at 150dpi.
Best way to replicate that is if you are using a standard monitor at arms length, roll you chair back (or stand up and move) two to three metres (6 to 9 feet) so you screen is only occuppying half the width in your field of vision is was before and try to read the screen.
That is roughly what people with the latest notebooks are seeing when the view your site. Except the monitor is normal size, the text and images are all 50% of normal size, because they have twice as many pixels per inch.
Nick
--
Nick Cowie
http://nickcowie.com
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