It's been predicted that there is a new wave of devices with enhanced saturation (there is a name for it - I forget), so this will only grow in importance!
I have two monitors from different brands. Even capturing a screenshot in them yields colors that are not quite the same (maybe due to one of them being slightly aging and being calibrated?).
Any good intro on this area?
Calibration is the only answer, but really, other than color critical applications, such as press matching, color matching is not as important as it may seem. Every device will display colors a bit differently. This isn't really a problem, since our eyes naturally correct for small differences, ie. you won't see the difference unless you see them side by side.
The color gamut for all monitors is a function of their luminance (ie. how bright they are), plus edge enhancements that push some chroma values further. These devices will actually suffer from color management, since trying to maintain device independent color will actually inhibit edge colors.