Kohler makes a touchless faucet. You wave your hand under the faucet and it turns on and off. I've had one for years, and it's great in the kitchen. Most commercial lavatories have the same technology.
I got it and absolutely love it. Takes a bit of getting used to of course, but after being in my kitchen I expect all taps to work like this.
The biggest downside is that visitors will be confused why the water doesn’t run (the physical tap is always left open but there is a “virtual” tap controlled by the sensor is not.
