We actually went back and ripped up an iPhone 5s Screen for comparison and research; it turned out it was very similar to this (minus the 3D Touch Sensors and the mylar being part of the backlight). The only other teardown we've done specifically on a device's screen was for the Retina MacBook Pro.

I can't be sure about Apple's policy on screen replacement, though I assume to maintain good success rates for repairs and turnaround times they'll just replace the screen assembly. Independent repair shops are another story; depending on their experience level and access to the necessary tools and parts, it is totally possible to perform. Ultimately it seems a bit more time consuming for something that is usually a 10-20 minute part swap. On top of all this, the people who provide parts will almost always provide displays in their entirety instead of layer by layer.

I think this will be a refurbisher only kind of procedure.

Yes sir, that is correct. I double checked and referenced our old Chromecast teardown and it seems there was a major decrease in flash memory and the RAM has stayed the same.

All of the chip specifications were in Gb, just like the 2013 Chromecast.