AI硬件应该要承载3方面的功能：1.及时的交流，随时在线；2.依托场景理解的主动式服务，这一点是目前在手机端做不到的；3.持续的协作服务，比如健康管理，感知睡眠、心跳、血压、血氧等，这一点手机端是做不到的，但像戒指这一类AI入口级硬件是有机会的。
Number (2): Everything in this space must add up to 2. The answer is 0-1, placed vertically; 3-1, placed horizontally.
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They all organize data by location so you can skip irrelevant regions, replacing "check everything" with "check the things that could possibly matter." That's what took us from a million comparisons to ten.
1 & x_n & x_n^2 & \dots & x_n^n