In Toronto Star article http://www.thestar.com/news/world/2016/01/27/deepmind-computer-program-beats-humans-at-go.html

"As Hassabis told reporters, the same principles AlphaGo uses have many applications, from better digital personal assistants to improved medical diagnostics and far, far beyond. Because the algorithm is general-purpose, it could respond nimbly to complex information like voice instructions, for example. "

From general reading, it looks like AlphaGO uses two neural networks working together to prune the search space and evaluate the next move.