While minor improvments over time are inevitable. I strongley beleive Gor Tex probably hasnt changed much. For the most part marketing stratgy is the key. Give it a Name and they will spend! Fabrics are not as high tech as computer processors. NYlon is nylon and coatings are coatings. I may be wrong here but there are now many generic versions of Gor Tex. I do own a set of Gor Tex I Purchased at Cabellas over ten years ago. Until I see strong non biased evedence of comparing apples to apples and oranges to oranges, I have no intention of laying out another 250.00 to 300.00 to replace it!
Happy Trails!