How about projecting info/data/image from "UNDER" the glass like a dashboard hud in automotive. You would need zones on the glass that have a tint applied so the projected light would be visible like P2k but inverted. This could be as simple as a semi-transparent decal you could apply on glass. In a way it is pinball 2000 upside down but it is much more I imagine the light could emit from various mechanisms all over the playfield. The math checks out, it can be done...