Lysander Ashton of 59 Productions talked with The Guardian about wonder.land's visual inspirations, and also touched on the question of capture:
Q: Will you be making any technological innovations?
A: We’ll be using quite a lot of motion-capture, which is quite new and novel in a theatrical environment, if not in a film-making one. Because there are going to be moments where the actor onstage interacts with a projected character, we’re going to have a motion-capture suit in the rehearsal room and have the scene played out between the two actors.That sounds like it might possibly be pre-recorded, but I'm still not sure. I'll keep digging to see if I can find more in-depth intel on the making-of.
On a not unrelated note, fellow Manchester International Festival artist Ed Atkins explains his more conceptual Performance Capture to Aesthetica magazine.
(hat tip to Ryan Porter and Alan McLaughlin)