Last to leave the display assembly: the home button.

It's more like the home touch sensor really. No buttons about it.

Analog Devices AD7149 Capacitance Sensor Controller

For those of you waiting with bated breath, it appears that the new solid state home button is removable. It won't be a simple procedure, with tiny tri-points and light adhesive on the cable—but there is no longer a delicate gasket to replace. Overall, it is a step in the right direction.

A replaceable home button is great news for consumers. The mechanical home button has been a point of failure on past iPhones. While our data shows that the reliability of the home button is better in the 6 and 6s compared to the 5 and 5s, we’ve still had close to 100,000 people use our iPhone 6 home button repair procedure.

Additionally, the move to a non-mechanical button should improve overall reliability and reduce the need for replacement. Not to mention, it looks great under an X-ray.