The best option I've heard about, not actually tried, is projecting the map to a table surface, this combines best of the "printing" and "digital" worlds, but requires expensive projector... For now I'm using battlemaps and printed maps, usually not up to full scale. I'm not sure if there's a solution to this problem on developers' side, but I'm all for adding high-res versions of all maps as additional archive.
What, from above? Surely your shadow would prevent you seeing where you were moving your minis?