That's not how anti-aliasing works! Essentially all digital screens benefit from anti-aliasing, irrespective of the resolution. Even if you had a screen with an absurdly high resolution, such as 38,400 × 21,600 ("40K"), without anti-aliasing you'd still get issues like moire patterns and shimmering when viewing highly detailed content with regular patterns.
However, past a certain point, the benefits are less noticeable, whereas the overheads of AA increase to absurd levels. Trying to super-sample an 8K game will still bring the best GPUs in the world to their knees.
It renders a ton faster and you won't see the difference, because you need anti-aliasing when 1px=1px, you don't when it's subpixel anyway.