If you do most of your computing in a prepared or controlled room, I can see the logic in that, although I think I'm not personally nearly sensitive enough to care.

For me though, I am frequently working in different rooms with arbitrary lighting situations. Net effect of the gloss is negative for me unquestionably.

This is a monitor, not a laptop. I pretty much set it down and never moved it again. In my case, a glossy glass screen is ideal.