Apple may not be the first to implement new features, but what it does ahead of the competition is to implement industry-first actions like removing the 3.5mm headphone jack, removing the power adapter from the in-box contents, and now, it is ready to completely remove physical buttons from the upcoming "high end" iPhone 15 Pro models.
According to popular analyst Ming-Chi Kuo, Apple could remove the power and volume rocker buttons and instead, replace them with 'taptic buttons,' something that we have previously seen starting with the iPhone 7 series, when Apple removed the home button in favour of a solid, immobile button that used the Taptic Engine to use haptics for click emulation.
Currently, Apple ships iPhones with one Taptic Engine for haptics and vibration but as a result of implementing solid-state buttons, iPhone 15 Pro models could come with 3 Taptic Engines, instead of one.