The Biggest Takeaway From Apple's Worldwide Developers Conference

NEW YORK (TheStreet) -- I couldn't sit down and watch the two-hour Apple (AAPL) Worldwide Developer Conference presentation during the workday Monday when everyone was tweeting about it.

But last night, I got to sit down and watch the entire presentation on my Apple TV.

I think there were some great takeaways from the event.

The biggest one: Apple will no longer let any better feature on a competing platform exist without adopting it on iOS.

Up until now, Apple has always had a rock-solid platform with iPhone that attracted many users. For the first few years after the release of Google's (GOOG) Android operating system, Apple users seemed to look down on Android, even though its growth in market share was impressive. It just seemed a little bit half-baked. It wasn't as refined. It was a poor man's version of iOS.

But this has changed in the past few years. First, Apple users seemed to have large-screen envy. Then, they started to notice other ways in which Android was actually ahead of Apple. The keyboard seemed better on Android because it was open to third parties to develop. Google Now also seemed to be ahead of Siri.

Other platforms like WhatsApp (now owned by Facebook (FB)) and Snapchat seemed to add more functionality than iMessage as well.

What was clear in Monday's presentation was that Apple is playing offense again. For a long time, the perception was that Android was ripping off Apple.

Yesterday, Apple showed it's not afraid to rip off other people if they come up with some interesting features that Apple thinks its users would like in their iPhones.

The other guys were bellyaching yesterday. The founder of WhatsApp, Jan Koum, tweeted snarkily that Apple seemed to be "innovating" by copying a lot of WhatsApp features. Excuse me, Jan? That's rich, coming from the guy who completely ripped off BlackBerry Messenger. Your one great "innovation" was going cross-platform with a BBM clone. Congratulations. But don't get so high and mighty, assuming that Apple can't come along and add video share, voice memos and location data to iMessage. This isn't kindergarten anymore, Jan.

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