AIXI is simple, and if our universe happened to allow turing machines to calculate endlessly behind cartesian barriers, it could be interesting in the sense of actually working.
We have wildly different definitions of interesting, at least in the context of my original statement. :)
There have been a couple of brief discussions of this in the Open Thread, but it seems likely to generate more so here's a place for it.
The original paper in Nature about AlphaGo.
Google Asia Pacific blog, where results will be posted. DeepMind's YouTube channel, where the games are being live-streamed.
Discussion on Hacker News after AlphaGo's win of the first game.