Just FYI don't expect high frame rates (minimum/average of 60FPS) at 1440p with a single 970 on new games or even recent older ones like Crysis 3 and Far Cry 4. Forget about it on Witcher 3. Battlefront and the other Battlefield series are more friendly however. When I upgraded from a 1920x1200 to a 1440p monitor, I had to buy a second 970 to get my minimum FPS above 60FPS to keep things smooth. I have everything V-sync capped at 75FPS for my overclocked 75Hz Dell 1440p monitor. Smooth as warm butter.
The good thing about moving up to 1440p is that you do not need as much AA (I run no more than 4xAA in games, and usually run 2xAA in the game and FXAA in the Nvidia control panel for the game that supports it for a more frame rate...