Number 4 got me curious about the latency for the competitors catching up with the various hardware advances.

Capacitive touch screen:

  iPhone: June 29, 2007
  HTC Dream/G1: October 20, 2008 (479 days later)

Fingerprint sensor:

  iPhone 5s: September 20, 2013
  Galaxy S5: April 11, 2014 (203 days later)

ARMv8 (64-bit) ISA:

  iPhone 5s: September 10, 2013
  Galaxy Note 4: October 17, 2014 (402 days later)

Tiny bezel:

  Galaxy S6 Edge: April 10, 2015
  iPhone X: November 3, 2017 (938 days later)

OLED screen:

  Samsung Galaxy: June 29, 2009
  iPhone X: November 3, 2017 (3049 days later)