If it ain't broke don't fix it - in that sense, I wish Nvidia would just do a die shrink of the GTX 1080 to achieve half the original TDP, but keep or improve the performance of the original, and then sell it for a good price.
Regarding 2560x1440, it's actually a great resolution for gaming at high frame rate and with a lot of details. First, because there are fast monitors available, such as Samsung Odyssey G6 or G7 VA at 240Hz, LG 27GR95QE-B OLED at 240Hz, or Asus PG27AQN IPS at 360Hz. Second, many slightly older games can sustain 120Hz and above frame rates easily at 2560x1440 on a decent GPU.
But with newer games, there is hardly any GPU that can fully utilize such a monitor.
For example ... is there yet an affordable GPU that can run GTA-V or Red Dead Redemption at 2560x1440 with high details and eye candy, while sustaining a minimum of at least 120fps?