Something I missed in this great writeup was the Datapoint 2200 terminal (the ancestor of the 8008 MPU), announced in 1970 and introduced in 1971. It originated from an idea about a replacement for the 029 key punch (intended to replicate the prior success of CTC's Datapoint 3300 terminal as a drop-in replacement for the ASR 33 TeleType.) From this initial idea the Datapoint 2200 directly inherited the 80 x 12 layout of the Hollerith punch card. (That this fitted quite perfectly into 1K, certainly didn't hurt and may have been an incentive for keeping the dimensions of the initial project. Reportedly, the narrow built height resulting from the narrow 12-lines screen was generally liked by users.)
Compare: Wood, Lamont. Datapoint: The Lost Story of the Texans Who Invented the Personal Computer. Hugo House Publishers, 2013.
What may be interesting, as well, is that the earlier Datapoint 3300 terminal (announced in 1967, shipped 1959) already featured a 25 lines display, but at 72 characters per line, just like the ASR 33 it was meant to replace. There seems to be no hard evidence on how CTC arrived at 25 lines per screen, though.
Regarding the Datapoint 2260, there's prior art in form of the IBM 2260 Model 3 terminal (1964), featuring 80 characters in 12 rows as well, in direct correspondence to a punched card. (The Model 1 displayed 40 characters at 6 lines, while the Model 2 managed 40 characters at 12 lines, with only the top model of the family featuring this relation to punchcards, though. Bonus fact: the 2260s used a portrait raster tube turned on its side, resulting in vertical scan lines.)
Compare: Wood, Lamont. Datapoint: The Lost Story of the Texans Who Invented the Personal Computer. Hugo House Publishers, 2013.
See also, https://en.wikipedia.org/wiki/Datapoint_2200