[mister_mister]

It means that are other metrics such as torque, Fuel economy, Noise/Vibration, Power-to-weight ratio.

Here is a link to the metrics. https://en.wikipedia.org/wiki/Vehicular_metrics

Here is video explaining why horsepower doesn't really make that much sense. https://www.youtube.com/watch?v=gC2-JKO0c2I

Just like calories, horsepower doesn't explain much.