(CNN)iPhone owners with an Arizona driver's license or state ID can now upload either to their Apple Wallet, marking the first time a US state has supported digital versions of this type of identification in the app. But the uses remain very limited, for now.

Starting Wednesday, Arizona residents with TSA PreCheck can present their digital driver's license or state ID by tapping their iPhone or Apple Watch at select Transportation Security Administration checkpoints in Phoenix Sky Harbor International Airport. However, they'll still need their physical IDs to fly home if traveling to a state that's not in the Apple program — in other words, any other state in the country.

(As cell phone "wallets" have been hacked, I question the security of digital IDs. It seems like another tool for identity theft.)