With this update Tesla hints at an upcoming release of commemorative cards. These could be collectible cards or achievements for performing certain actions or reaching specific vehicle milestones, such as driving 50,000 miles or using pre-conditioning for the first time.
The outline of the cards was discovered in the app's source code by Tesla_App_iOS. They reveal that there will be rare variants (gold) and regular versions of each card, although it doesn't offer any hints at what will be featured on each card. It could feature specific Tesla products or special achievement logos similar to Apple's fitness badges on Apple Watch.
However, the images are only in Chinese, so it's not clear whether this feature would be exclusive to China.