As mentionned by Henri Beauchamp into another feed : "If you want beautiful and sharp renders, right now, without any change to max texture size, there is something much more useful that could be done, which would cost zero VRAM and zero RAM, and would have almost no measurable impact on frame rates: replacing the lame FXAA anti-aliasing shader currently in use and which badly blurs texture details (whatever the texture resolution) with a better one, such as SMAA.
Have a try at then Cool VL Viewer which implements it, to see the impact..."