Lava is running a 24"-4K monitor though. I haven't seen it, but I can't imagine needing much, if any, AA. It seems like turning down other settings might be more noticeable though due to the hires image?
We need another pixel quadrupling (8K?) to get to "retina" density on a 24" screen, according to maths. So there is no way to get rid of AA altogether for now.
However 1080p 4x SSAA should look almost exactly like 4K with no AA. Which is both a strong argument for SSAA, since it can be had at a lower performance hit and it's a strong case for visual quality of 4K, after all AA is nothing but a carefully down-sampled high resolution frame.
Better yet 4x
MSAA only comes with a ~25% perfomance hit.
Everyone stands to benefit from sharper text and pictures on a still 4K screen, only I highly doubt that there are benefits to pushing moving pictures beyond even 720p outside of large screens. Just a lot of pixels you never get to see. Perception obviously is about more than just pixels on the screen, or subjectivity.
For someone who is myopic (like me) the whole life is a blur anyhow. I suspect people who benefit from high resolutions tend to be literally far-sighted, sitting very close to the monitor.
The biggest gain in visual and game quality is to be had when line of sight is both increased and improved, allowing for an ever bigger virtual reality box around the player. 3D games managed that by scaling down the textures and geometry in the distance.
We'd be better off spending processing and bandwidth on that, than resolution, which more than ever is a dodgy upselling strategy.