At least when it comes to new cars.
The National Highway Traffic Safety Administration (NHTSA) just announced plans to eliminate drunk driving in the future. Okay, it didn't go as far as saying that, but it did reveal the Driver Alcohol Detection System for Safety, or DADSS. The system is designed to quickly and subtly measure your blood alcohol content to see whether or not you're fit to drive. Using infrared light, the system measures your BAC via either your breath or fingertip, with each option mounted on the driver's side to ensure correct readings.
You can get a complete rundown of the system in the video here.
The NHTSA hopes to have DADSS available as a safety option within the next five years. Technology develops at a rapid pace, and in five years the tech behind the system could be so advanced that it would be cheap to mass produce, thus taking it from "optional" to "standard." At the very least you can expect supercar companies to include it on rare models. We're really sick of seeing rare exotics wrecked by drunken boneheads.