10 Yr Old StudioTek 130 Vs StudioTek 130 G3?

There is no humanly way possible to tell the difference from normal viewing distances.

you might be able to tell with the projector off, a magnifying glass and looking at the screen surface from 2 inches away. but only with a side by side comparison.

ahh salesmen

whatever the difference in cost to get the new screen can likely make big differences if you focus that money somewhere else in the theater. getting a new version of the same thing will not. Now if you got a High Power (completely different screen material) I'd say yes you will notice a big difference.

I have heard and read about there is a difference. Stewart screens do have a chemical coating on them from what I've been told.

From what I understand and this is just what I have read over in the Stewart screen thread is that the G3 material was reformulated to reduce the "sparkles" that some folks were seeing with the newer higher light output 1080p projectors. There was apparently some interplay between fixed pixel 1080p projectors, their light output, and smaller screen sizes with the G1 fabric. So if you see sparkles in bright areas that is the weakness with the G1 fabric. I am not sure why a screen would have any impact on the sharpness of standard DVD material given theirrelatively low res. I am with Tryg on this one and the sales person.