Mark Zuckerberg faces a very different world since last year's big Facebook confab
When he gives his keynote presentation at Facebook's annual developer conference on Tuesday, CEO Mark Zuckerberg faces a very different world · CNBC

When Facebook (FB) CEO Mark Zuckerberg told Wall Street in February that the company was looking for ways to "grow the ecosystem of video content" on its platform, he probably didn't have Steve Stephens in mind.

Stephens is a Cleveland, Ohio, resident accused of shooting an elderly man in the head, then uploading the video onto his Facebook page -- where it stayed for several hours -- before streaming his post-shooting activity on Facebook Live.

And Stephens, the subject of a police manhunt, is not alone in using Facebook Live to promote a gruesome act.

Other footage has recorded a suicide in India, an accidental shooting in Chicago and a standoff with police in Baltimore. The latter ended with the death of a woman whose account was suspended by Facebook at the request of the police department that shot her soon after.

While Facebook says it is quick to take such content down, these incidents are reminders of how much has changed for the company from a year ago, when only celebrities had access to the Live feature.

Now, as Zuckerberg prepares to deliver his keynote address at the company's annual developer conference Tuesday morning, he'll look out onto a world -- and a competitive landscape -- transformed from last year's confab.

While some of these changes are outside Zuckerberg's control, many have been driven by Facebook's inexorable efforts to deliver ever more sophisticated services, to stay ahead of its arch-rival, Alphabet, and its newest competitor, Snap.

Apart from the violence on Facebook live, here are other ways Zuckerberg's world has changed in 12 short months.

Zuckerberg has accepted his power and responsibility

Zuckerberg has for years resisted calling Facebook a media company, even as the site became a main source of news for its users.

He's also said little about the impact its technology has had on anyone outside of its own users.

After an outcry from critics who claimed the proliferation of fake news on the site has helped fuel partisan divisions in the U.S. -- and may have helped elect President Trump -- Zuckerberg said of Facebook, "we must be extremely cautious about becoming arbiters of truth ourselves."

Yet in a 6,000-word manifesto released in February, he was less ambivalent about the role Facebook can play in shaping the world's future.

Indeed, the company has the potential to build a global community that is, in his words, "supportive, safe, informed, civically-engaged and inclusive."

Although he disputed in November that the company had changed the election's outcome, Facebook has since has begun working with third-party fact-checking sites to verify posts.