Me thinks they are missing the point.
I have a brother-in-law who has colllected all the pre 1990 sets back to the 1930's. He does it all by e-bay. He's well off, but not made of money. He comes at it from a stamp collectors point of view where the value lies in the completion of the set more than the love for the intrinsic thing. I'm not confident that I understand.
Still, pdf sets will just be laughable.