The ability to complete point-of-sale transactions using wearables alone represented a market worth US$285.47 billion in 2019, according to new market research. However, this value is also now thought to grow until it reaches $1.37 trillion by 2027. This trend may be influenced by an increasing demand for novel ways to pay that are contactless as well as cashless.
https://www.notebookcheck.net/Wearable-payments-might-fund-a-near-US-1-4-trillion-market-by-2027.487541.0.html