Pitted windscreen
I have a 2007 Skoda Octavia VRS diesel that has covered 120,000 miles. I have realised that the windscreen has hundreds of tiny marks, similar to pinpricks. Having read your response to someone asking about scratched glass, I wondered if a windscreen-polishing kit would get rid of these?
I would first ensure that the marks you can see are in or on the glass. Given so many tiny marks, it would be unusual if the cause was a large number of tiny stonechips. By running your fingers over the glass, you should be able to determine if the marks are inside the screen or on the surface.
I am assuming your vehicle hasn’t been parked near anywhere that grinding has been carried out, as I have seen the tiny flexes thrown off from a grinder adhere to surfaces and give a similar effect. If the problem is due to either tiny indents or flexes adhered to the screen, then a windscreen-polishing kit such as the one offered by glasspolishshop.com (http://bit.ly/2zbg2oq) might help.
There is another possible explanation for the tiny marks, which is that the lamination in the centre of the screen is beginning to deteriorate, which results in tiny white marks appearing within the glass. If this is the case, it can only be rectified by replacing the windscreen.