I'd like to also add that with the advent of resolution independent displays (such as seen in the current generation of mobile devices) such limitations like th

I'd like to also add that with the advent of resolution independent displays (such as seen in the current generation of mobile devices) such limitations like this will slowly fade away; although this most likely won't happen for a while in the desktop world (there's more of a demand for size of display than resolution of a display currently, and most operating systems don't have great support for resolution independence as it is [somewhat untrue for fonts oddly, as the kerning algorithms make use of subpixel resolution, but most UI's are pixel/raster based at only one resolution]).