Edge: I really do believe that interactions with characters are going to be a huge big deal in the future of gaming, a revolution that will permanently change things.
I do not mean MMOs featuring new ways to communicate with real humans. Not cutscenes with superior rendering of facial expressions. Not dialogue trees with a kazillion branches. Instead, I mean the stuff I typically write about: some way to craft your relationship with an NPC with the same freedom you have when building your RTS base or attempting a combat tactic in an FPS. To arrive at moments between you and an AI character that are as wholly yours and unpredicted by the game's creator as your wildest GTA story.
Eventually, someone is going to get something right in an unprecedented way, totally nail a cultural nerve, and amass an enormous fortune, following which clones and evolutions will drive R&D further in that direction and beyond to nearby branches.