"Pet Sounds" marked the origins of progressive pop, a genre that gave way to progressive rock. "Tidal" contributor Ryan Breed cited the album's "non-rock instrumentation (strings, brass, Theremin, harpsichord, tack piano), dizzying key changes and complex vocal harmonies" as features that informed prog-pop. Journalist Troy Smith similarly cited "Wouldn't It Be Nice" as "the first taste of progressive pop" subsequently elaborated upon by bands such as the Beatles, Queen, and Supertramp. The album also furthered the "rock as art" concept heralded by "Rubber Soul". In the belief of music journalist Barney Hoskyns, "If the Beatles' "Rubber Soul" was the first album to make a case for pop music as a maturing art form, 1966's "Pet Sounds" was a quantum leap into the unknown".