The MWC 2015 featured significant advancements in smart devices, particularly with Samsung announcing its mobile payment system, Samsung Pay, and Google revealing Android Pay as a new payment platform. Additionally, industry trends highlighted the rise of wearables, emotional interfaces, and advancements in connected cars, including a collaboration between Visa and Pizza Hut for mobile purchases. The event also showcased innovations such as Qualcomm's Sense ID for fingerprint scanning and various new smart devices, signaling a dynamic shift in technology and user experience.