If I don't care for the new product, what would the formatting of that product matter?
While I feel that the dropping of pdfs was a mistake on Hasbro's part, mainly because electronic versions of books are becoming so common, so mainstream, the notion that I am not playing 4e simply because they do not have an electronic version of the game books is rather silly and limited.
It's like this: I far preferred the 2nd ed of RuneQuest to the 3rd; I far preferred the 4th edition of Ars Magica to the 3rd; I far preferred the 2nd edition of Paranoia to the 1st; I far preferred 3.whatever edition of D&D to 4e. These are tastes in how a game runs, the mechanics under the hood. Sometimes the changes are small, sometimes larger, but I play (or don't play) a game because of a combination of core mechanics and group dynamics, not the physical form of the rules.
So, no, return of pdfs, while it would be very good for people who currently play and enjoy 4e, would not bring me back.