Sony recently filed a patent application for temperature changing material to potentially use in PS5 controllers.
Controller
Sony patents new thermally-reactive and ultra-sensitive PlayStation controller
PS6 controller can change temperature?
Sony files patent that turns a PS5 controller into an earbuds charging case
Sony's Shape-Shifting, Temperature-Changing Controller! - SDN
Sony Explores Shape-shifting, Temperature-responsive PS5 Controllers
PS5 DualShock 5 Controller LEAK: Patent reveals incredible new Sony features - Daily Star
Sony Patents New PS5 DualSense Controller, uncharted pc dualsense
Sony Patent Reveals Temperature-Changing PlayStation Controller
New PlayStation controls: Sony bets on the change of shape and temperature
Sony Patents Spherical Controller
Sony patents temperature control sensors that could feature in the next DualSense controllers
Sony Patent Suggests DualSense Could Get Hot And Cold To Reflect Gameplay