Jersey Jack mentioned this in today's update:
In our next update we will show a video comparison of our new INVISIGLASS TM that is included on all ECLEWOZ games and of course, more, more, more...
I'm leaning toward the glass on approach. This will keep the noise down so Chris Granner's awesome sound work can be better heard through a direct sound mix. I don't see a reason PDI/INVISIGLASS will be unpopular as opposed to no glass if glare isn't going to be a problem. I'll have to test on site to see if there's any LCD glare.