Philippe Parreno

I would say that was one of the best art work I have seen in the last months.
I would recommend to go to the gallery and have a look on it first without any prereading about what he is showing there. That's the way you get the most from it.

Serpentine Gallery:
http://www.serpentinegallery.org/2010/11/philippe_parreno_25_november_1_1.html

http://www.airdeparis.com/parreno.htm

In his interview in Guardian he says: "I devise my exhibitions like a film," he says. "I think about sequences, about the rhythm of the experience for the visitor. Or like music: my exhibitions often unfold like a musical score. They unfold in time."
(http://www.guardian.co.uk/artanddesign/2010/nov/15/philippe-parreno-interview-serpentine)