Nah, just being dramatic. I've been trying to come up with a way to incorporate the same pixelated effect seen here. I'd seen another artist who does whole paintings as pixelated images, usually porn, to extend the 'anonymous' metaphor.
Apparently Banksy dropped by the Walker Art Gallery in Liverpool, England and left a present. According to Juxtapoz magazine, Banksy remarked, "I guess you could call it a Christmas present."
There's a bit more information in the BBC's piece on it. The Juxtapoz article doesn't answer the question of whether this piece is another bit of guerrilla art or whether Banksy is working with the gallery. According to the BBC, Banksy approached the gallery, which gladly accepted. The artist insisted that the sculpture be placed among pieces of the same period as the replica 18th century sculpture that the artist used as a base for his work.