No, 2x290Xs and 2x780TI SLI can't do it with everything maxed out at 1440p on every heavy hitting game; and those are better cards than 970s. For a constant 60 FPS at 1440p, even 980/780TI SLI 290X CF will need to turn settings down on some games; and 970 SLI is a tier below those dual card setups. 1440p is a significant performance hit, not as bad as 2160, but still big. You throw in a game like Crysis, AC4, etc, you're going to need to turn settings down; usually AA to get a constant 60FPS. If you look at video card benchmarks in reviews they are usually turning something down and using a lower setting for AA, like 2xMSAA or just FXAA. This is what I get at 2K (roughly the same as 1440p) with 780TI SLI on crysis 3 with 8xMSAA and everything else maxed out: 2015-02-01 22:43:14 - crysis3
Frames: 55311 - Time: 1129260ms - Avg: 48.980 - Min: 0 - Max: 83