Apple's new passport-based Digital ID is rolling out on iPhone and Apple Watch — giving travelers a new way to clear TSA security lines with just their device. Why it matters: It's the biggest step yet in the tech giant's push to make the Apple Wallet app a digital replacement for everything in your pocket — from credit cards to car keys to IDs.

Yes, you can store your U.S. passport in your Wallet app now. But don’t leave that hard copy at home just yet.