The other reason is readability. With the changing resolutions, I won’t be surprised if people also tweaked their screens DPI (dot per inch) setting. This setting can make text and images to be displayed bigger (or the same with a lower resolution screen), even when the physical screen becomes bigger. This makes text more readable even with a ultra-high resolution display. Nonetheless, the upper limit in nice, readable web typography is 75 characters wide, give or take a few characters.
Now, with the variety in user needs, what’s the best width for blog templates? (Length or height is rarely an issue because people are used to vertically scroll).
Read more at http://www.bloggingpro.com/archives/2010/01/09/whats-the-right-blog-template-width/#B805yGkPjhoiZBCk.99
