Dev: "The Witcher 3 will likely not hit 1080p on consoles."

[SvennoJ]

It would be nice if we got the choice to have black borders instead of upscaling. 1600x900 is fine, but leave the other 17% black or put the hud there. That was common practice in the old days. Like this:

That's a play area of 1670x920, avoids the softness that upscaling adds.