"Is it tempered ?"
I believe I called about this glass (Truvue) a few years ago and it was not tempered. Most of the glass used for pictures / paintings will not be tempered. Stern's price point is probably spot on for resale. I buy normal tempered 21"x43"x3/16" for around $60.
Stern has a long list of distributors. Sometimes distributors will bring your order to a show/expo free of charge. Might be the way to save some $$.
I'm also thinking the new HD glass will come standard on LEs and maybe Premiums. Maybe be an option on Pros. With the new Sterns you wont need to buy a ColorDMD any more with Stern's new display ($200 adder to old price).
We can always hope.
Has anyone ever sourced a tempered anti-reflective glass from a supplier who isn't a Pinball parts distributor? I doubt they're making this glass exclusively for Stern but I could be wrong.