I would not call myself an expert, but from my understanding of physics, a digitally driven device like TFT subunits will either work or not work.
A TFT will not degrade in the way the CRTs did. If you get dead subpixels, you´ll easily discover them. The backlight is another story, I never
saw two exactly equal TFT backlights with my displays until now. The flourescent backlight tubes may degrade over the years and give you
an uneven lighting by ageing, as the tubes become shady at the ends. The newer LED backlights will suffer less from age, I suppose.
Although the backlight may become a bit uneven, the backlight´s colour temperature should be rather steady until the day the lighting is almost dead.
After all, I think you should be on the safe side with your monitors calibration and an additional utility like Adobe gamma, which was included with Photoshop.
If you are thinking of professional DTP, you will do some proofing anyway or use a Pantone (or similar) colour system.