Apple executive team shakeups causing multiple projects to be put on hold

The holds were instituted so that managers could "reassess priorities," the Wall Street Journal said, citing multiple sources. The people didn't identify specific projects, or even what fields they are related to.

Regardless, workers accustomed to Apple's stability are "rattled" by the changes, since leadership went mostly unchanged for a period of about five years, the Journal continued. Some recent shifts include the replacement of retail head Angela Ahrendts, the appointment of John Giannandrea as senior VP of Machine Learning and Artificial Intelligence, and the removal of Siri leader Bill Stasior.

The company also recently cut over 200 people from its self-driving car team.

More of Apple's resources are shifting towards services, the Journal noted. Eddy Cue, senior VP of Internet Software and Services, has reportedly focused most of his engineering team on the company's upcoming video platform, which should be revealed March 25. The offering should mix original movies and TV shows with third-party subscriptions.

Apple is known to experiment with many ideas that never see the light of day. One of its more concrete projects, though, is believed to be an augmented reality headset. In fact the company recently appointed its first senior director of worldwide product marketing for augmented reality, Frank Casanova.