About Pearl ID:
1 - The software definitely supports it for payments
2 - 3rd party apps can use it
3 - You can add multiple faces
Rambo also found evidence that facial recognition may be possible when the iPhone is lying flat, corroborating an earlier rumor from Bloomberg.
It's believed that Face ID will replace Touch ID on the iPhone 8. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.