My opinion is the strategy of Hasbro/WotC is strengthen the power of D&D as brand. They don't want D&D only to sell books TTRPGs but also other types of products like comics, novels, toys, media or videogames.
This last is changing the industry. I would bet WotC now is playtesting d20 version of different TTRPGs by other rival publishers to create a true universal d20 where you can use the same monster stats to play with superheroes, transformers, G.I.Joe or Conan (isn't this public domain yet?). And they want to create the ultimate D&D videogame, maybe the Warcraft-killer, not only other Diablo clone, but mixing RTS, skimishes wargame and standar action RPG, with option to create your own quests, machinima, or asymetric games with a player as DM.
Tablets will replace the character files by paper, and in some miniatures games the DM will be IA of an app in your mobile or tablet (you can play alone, even with your own house rules, but you will never know where is the trap or the monster in the other side of the door). Publishers will sell the books as "collector edition" but most of the sold products will be PDFs and something like a mixture of mod and DLC.
Paizo still can publish a new Pathfinder spin-off, maybe something between pulp fiction and gothic-punk horror.