At the top end of the fidelity spectrum, you have hi-fi, which delivers a rich, multi-sensory, one-of-a-kind experience. Think Cirque de Soleil.At the tail of the spectrum, you have low-fi experiences, which may engage a single sense, are passively appreciated, and are getting cheaper by the minute.

Read 3D Glasses at the Symphony? Mamma Mia in your Netflix Queue?