Have long felt that in VR, in outstanding particular with landable planet surfaces, the LOD and mipmap bias feel both one and two notches too thrifty, for a visually pleasing experience.
Of course, raising them would greatly increase both rendering and terrain generation load, and I can't say I rate my computer's ability to shoulder it, but man, do things look soft and indistinct the way it is...
Still wonding about the viability of offloading procgen (and physics, as our demands grow rapidly, on all of how much of the virtual world is physics enabled, how complex the interactions, and how high resolution both the of collision meshes are, and the update tick) to a second graphics card - maybe one's old, last generation one - even without SLI, although I reckon that would be quite a bit of data to shunt around (EDIT: textures and geometry from the card that generated it, to the one that's going to render it)...