I'm sure this has been discussed, but I can't find it. I just recently added a second monitor and played with the screen settings to get the fonts more readable. I found that with high resolution the fonts would get a little bigger with DPI bumped up from the default of 96 to 120.
Well every thing rocked on fine for a few days till I noticed that some sites that we did had busted pages. Also some applications had small interfaces that wouldn't open properly with some text obscured.
A little Google search seemed to indicate a good bit of promotion for the 120 dpi set up, and I'm wondering how wide spread this use is. This appears to be another nail in the fixed fonts coffin.
My opinion based on a lot of user support and consulting, but totally unsubstantiated by any hard facts whatsoever, is that most users do not change from the default 96 dpi. If the number of users using 120 dpi is one tenth of one percent, I'd be surprised.
But why is this a nail in the fixed font coffin?
Most sites use fixed font sizing. Going to 120 dpi is one way of enlarging font sizes accross the board at the level of the operating system.
Also, I'd be interested to know exactly what visual side-effects you're referring to. Do the images look OK?
I probably should have stated that a little different. This site was done in our early days when we thought that with IE dominate we could control font size, and not have to do a good job on layout that would expand downward nicely. The nail in the coffin is to that idea. The text pushed down over the images below.
Also a few very nice templates that we were considering for a client were broken on the left and right edges.
I was using the trial of an application and all the little input screens rendered bad and were hard to use.
I'm back to 96 dpi and hope you are correct about the percent using higher. It's enough worrying about the different resolutions out there.