As an admin and techie end user who uses dual 24" IPS monitors, I didn't like the change at first, but quickly realized that it does provide a better reading experience. YMMV.
Normal people… believe that if it ain’t broke, don’t fix it. Engineers believe that if it ain’t broke, it doesn’t have enough features yet. – Scott Adams
1152px is 1200px when you add to it the padding of the body + buffer for the media query then looking for the closest value divisible by even increments of 12.