I've been following this for a couple years, lots of discussion on reddit /r/thinkpad. They basically produced a T470 with a classic style keyboard, and anniversary badging.
As far as what people hoped for, they couldn't do a 4:3 or 3:2 display, as that requires a larger bulk purchase than what they planned for this model (only 5000 units produced). The thinklight wasn't possible because the screen bezel is thinner. Hopefully they will use the classic keyboard on additional models in the future, but there is no indication of that at this time.
As far as what people hoped for, they couldn't do a 4:3 or 3:2 display, as that requires a larger bulk purchase than what they planned for this model (only 5000 units produced). The thinklight wasn't possible because the screen bezel is thinner. Hopefully they will use the classic keyboard on additional models in the future, but there is no indication of that at this time.