“I’m pretty sure that the next thing I work on will be in a game form. That I’ll say,” Ueda said. “I’m hoping that I can create something that has a lower barrier of entry. But when I say that, I don’t want it to be misunderstood as, ‘oh it’s an easy game,’ or like it’s a ‘casual’ game, or anything like that.
“What I mean by that is, you know, a lot of modern games can be very skill-based. Whether it’s controller input or responsiveness, they can get very technical. And it’s a little intimidating to some people. And so having a lower barrier of entry and sort of ‘loose’ form, that’s not as strict on you, is something that I feel like maybe that’s a place I’ll go next.
“Just because it’s that, though, I want it to have the same amount of impact, and leave a long-lasting impression on the player themselves, and take them on an emotional sort of experience and journey. I don’t know if that is the definition of what I want to work on next, but the image or feeling that I have, is that I want it to be something like that.”
http://www.digitaltrends.com/gaming/the-last-guardian-interview/
So a walking simulator :p