Next FinTech revolution in the making!!

Hello everyone, recently I got an idea of the iris payment system, which facilitates quick, seamless and hastle free payment without the need of a smartphone. All you need to do is just pull up to the shop, get your items billed, stand in front of the iris scanner which has your iris and biometrics stored and directly linked to your bank account, and the money is deducted from the bank. Isn't it way more seamless than upi? ps: I know I will need a hell lot of government authorization, but this still can be done, what if it becomes the next revolution? Kindly share your views on the idea and the challenges in implementation of it