Near future? No.
Gamers have too many excuses for why they "can't stand" digital products. Since there's an option, the majority of them are going to stick with what they have, rather than moving on to a new format completely.
The demand that rpg books be half coffee-table art book, half instruction manual also makes it difficult, as it's only relatively recently that you could get a portable reader that would be able to handle the pdfs of these books. The bloated size and other issues with how the pdfs are generated also indicates that evem the producers are uncertain how to put out a quality and functional product.
There's a thriving small press sector of rpg, where digital is the normal distribution so it's certainly possible.
For games like D&D where the company tries to keep you tied to physical products (miniatures and battlemaps) it's more difficult but still possible. For example, I purchased "Battle Map" made by razeware
Razeware | iPhone and iPad Apps for Gamers | Battle Map for my iPad a few days ago. It's got some limitations, but it's pretty darn functional. And I'm not going to have to rely on having some other computer act as a server, unlike the MapTools port that's being worked on.
The constant push for everything to be online is a killer too. I realize people think it's great to be able to access stuff with their smart phones; I'm sure it's quite handy, if you're rich enough to afford it. There's already enough stuff demanding we be online and taking up bandwidth. There plenty of place outside the U.S. where you're paying x amount of money per month not only for your internet speed, butfor the amount of data you're allowed to transfer as well. Email, web browsing, chatting, a quick game of deathmatch... All of it is chewing into your cap.
No, rpgs aren't going to be all digital for a long time yet. It's going to need another generation before it becomes a real possibility.