Last Updated: January 22nd, 2015
Update: Plenty of readers are saying that they've received 5.0.1 with AT&T SIM cards. The decision to publish this post was made after my testing and another AP team member saying that he had yet to receive 5.0.1 on his device as well. It's possible that the rollout to devices with AT&T SIMs is just moving at a much slower pace than for ones with other SIMs, but regardless, there is still something unique going on with AT&T.
Last Updated: January 26th, 2015
Update: Just as mysteriously as it entered the Play Store, Work Chrome has left - its listing appears to have been removed.
The idea behind Google's Android Work effort is to allow users of enterprise devices (whether BYOD or company-provided) to use the apps they're familiar with in one unified experience that keeps work and personal data separate. Work data will stay secure, with Android Work providing restrictions and controls for what can be done with the data, while personal data is readily accessible without needing to install any special third-party apps or launchers.