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If robots are to become more sophisticated, they will have to have more efficient, more precise and more intelligent actuators.
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The efficiency depends on the query size relative to the data distribution. A small query in a sparse region prunes almost everything. A query that covers the whole space prunes nothing (because every node overlaps), degenerating to a brute-force scan. The quadtree gives you the most benefit when your queries are spatially local, which is exactly the common case for map applications, game physics, and spatial databases.
理一县、兴一省、治一国，政贵有恒。“防止走弯路、翻烧饼”“不要城头变幻大王旗”“不能有临时工的思想”“不要换一届领导就兜底翻”“更不要为了显示所谓政绩去另搞一套”，而是坚强扛起“当代中国共产党人的庄严历史责任”。