I have some beef with your assertion that 1080/60 should be easy. Go ask John Carmack how much blood, sweat and tears went in to locking Rage down at 60 FPS. It takes much more than simple horsepower; it takes manpower. Lots of talented people working many hours to solve complicated technical issues. That costs a lot of money, for what publishers deem ultimately an unnecessary feature to sell the game to general audiences. That's the issue at hand here; there's not enough time and money to go around for making these super-duper awesome looking games for the next generation.
The dusk of big budget games rapidly approaches, leaving all but those with the blandest, widest appeal. It's not something you can change, and its certainly not the end of the world. Shit's just changing.
It should be easy but the very limited specs of this current generation of consoles makes working within those limitations while maintaining high resolution and framerate very challenging. They need to figure out where and how as well as if to cut down on graphical fidelity and/or other features to achieve that goal.
When working with a properly speced PC it's far, far easier by comparison to reach 1080/60 or even higher resolution and framerates. Hell even the rushiest port jobs to PC like the new Assassin's Creed can easily reach 1080/60 on a good PC.