Robots are Pouring Drinks in Vegas

Correct! - The check-in kiosks and robots that serve food and pour drinks are a substitute for low-skilled labor because hotels and restaurants use the new technology in place of low-skilled labor. As more hotels and restaurants use the new technology, the demand for low-skilled labor decreases, and the wage rate falls.

That's Right! - Occupations that are “more highly skilled” work with the new technology. New technology and high-skilled workers are complements. As the use of new technology increases, the demand for high-skilled labor increases.