What if the S1 chip in the Apple Watch–containing the CPU and virtually the complete system on a single chip–were replaceable? Looking at the images on Apple’s web site, I found an intriguing matchup. (Note that I am not a hardware guy, so this is not based off of any hardware engineering knowledge.)
If you look at the image that Apple uses to demonstrate the Taptic sensor, it shows the internals of the watch. Look carefully at the left side of the watch’s guts, and you’ll see what looks to me like some sort of connector or latch mechanism.