Quoted from swampfire:I accept that some people won't see the benefit. My wife can't see a difference between DVD and Blu-Ray, even on our 120" screen.
She should probably get her vision checked (seriously). Though that's actually kind of an apt comparison because the amount of difference you see can vary depending on the content and the environment. Something like Planet Earth benefits from HD more than something like The Simpsons.
Most of the time I have no issues with glare, but I played a South Park on location once where the glare from the backbox was just awful. I had to squat down and move my head around to try and see the ball when it was in the back of the playfield. I wonder if using darker colors and backgrounds is something the artists take into consideration when designing a translite.
I could definitely see a large difference between a WOZ with Invisiglass and one without when they were side-by-side at a show. It helps prevent reflections from the LCD, also.
So I can appreciate the difference, but I think $300 is pretty steep unless it's a game with particularly bad glare, or your room has lighting issues that cause glare.