1440p might be a nice middle ground for people with 4k TVs. Depends how much antialiasing you can drop when you bump the resolution. Personally I'd be fine with

1440p might be a nice middle ground for people with 4k TVs. Depends how much antialiasing you can drop when you bump the resolution. Personally I'd be fine with chrckerboard rendering if it looks good in practice and allows higher quality graphics. True 4K could be reserved for VR.