I believe the iPod changed lives because, at the time, there were not many portable devices available, but the emergence of the iPod allowed users to carry a large amount of music in one device, integrating this information. Then came the iPhone, which was a milestone at the time because many users were still using phones with physical keys, and the iPhone represented a true touchscreen device that was portable. The iPhone’s touchscreen discarded previous physical keys and integrated them into virtual ones, creating a larger application platform for designers to use. The impact on interaction design was that it paved a new path. Previous designs were based on physical buttons, which limited the size of the device; however, turning these buttons into virtual ones allowed for more creative possibilities. After the advent of touch technology, more designers began to study the interaction between hands and screens, making the user experience feel more natural.
