Even sub-pixel hinted glyphs look blurry on a 1680x1050 display (I have one), if you have good eyesight. Compare with non-anti-aliased text, and the difference is stark: edges are white-grey-black versus white-black.
Some people's eyes prefer the non-anti-aliased one. It just stands out more clearly.
Personally I used to dislike that slight blurriness, but eventually I decided it's ok on a screen with very small pixels, because the letter shapes are better.
I still use a bitmap font in my text editor though. I tried anti-aliased text in that, and didn't like it. The bitmap fonts look clearer to my eyes, like the difference between clear glass and slightly frosted glass.
If you think the difference is negligable, consider that GUI elements such as boxes and thin horizontal/vertical lines are still drawn (in current GUIs) an integer number of pixels wide, and exactly on the pixels, because they look noticably clearer than drawing thin lines with an anti-aliased vector renderer at fractional positions.