What exactly is happening in AI development?

So just a few days ago, there were some sensational results in AI development. For example, AI defeated a chess grandmaster and even a Go world champion.<br><br>I'd like to know what's happening in AI development right now. Is it similar to those historical events?<br><br>Can you let me know if there have been any breakthroughs in AI just recently and how exactly this technology is being used?