Curved glass is more likely to glare, at least at some point along its surface. A flat piece of glass will only glare when the angle to the light source is the same as the viewing position (the curve will have some tangent that satisfies this equation (and if you move your seating position there will be another)).

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris