Which retail display innovation, introduced in 1937, revolutionized product merchandising by allowing customers to touch products before purchasing, and is credited with boosting sales by over 30% in its early implementations?

Before the 20th century, most products were kept behind counters, and customers had to ask clerks to see items. The evolution of retail display strategies revolutionized how consumers interact with products. This poll explores a pivotal innovation in retail history that transformed the shopping experience and fundamentally changed brand-consumer relationships forever.

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Self-service shopping carts (invented by Sylvan Goldman)
Open-shelf displays with 'Please Touch' signage (pioneered by Selfridges)
The 'Impulsinator' countertop display (created by Alfred McLellan)
Mannequin window displays with seasonal rotation (developed by Macy's)