A few years ago I did word clouds based on Game Developer Conference tweets as a quick way of gauging the main themes. Why not do it again? I also get to see how the Twitter API has changed since last time.
Tuesday March 14th, summits and VR conference. No big themes, but VR and Ubisoft show up (Ubisoft mainly for their lounge, though):
Wednesday March 15th, more summits, VR, and the announcement of PlayStation VR. Complete domination by Sony (President Andrew is Andrew House, president of Sony):
Will post the coming days as well.