One advantage of high-density displays you sometimes see mentioned is that "we won't need to use anti-aliasing / sub-pixel rendering!" However at the common "h

One advantage of high-density displays you sometimes see mentioned is that "we won't need to use anti-aliasing / sub-pixel rendering!" However at the common "high" density used in cellphones these days, 320+ DPI or so, artifacts in non-AA fonts are still visible (not always, or to everybody, but sometimes anyway). So, at least, there are some cases where higher-density than today could yield some benefit.