Move
The PlayStation Move was seen by many as a complete rip-off of the Wii-mote. It had mostly the same shape, you held it like a Wii-mote, it even felt like one. Despite the slow sales, the Move increased in popularity over time because of its very responsive nature, great sensitivity and immersion granted by both the glowy ball at the top (used to track its location via camera) and the multitude of sensors inside the wand itself.
In addition, it’s going to be compatible with the PS4, and the Dual-Shock 4 features the glowy thing of the Move! We like glowy things.