Skeptical on this implementation, but it raises an interesting question. How close are we to having wireheads/current addicts walking around with drouds attache

Skeptical on this implementation, but it raises an interesting question. How close are we to having wireheads/current addicts walking around with drouds attached to their heads at all times? At what point does current addiction become consumer-grade? I guess the bonus with this implementation is that it doesn't involve dropping a wire into your brain.