Chapter 8: The frontier ― AI, and into the physical world
Up to here, we've seen four upheavals. The kinds of brain exploded (Ch. 2), the language of design was opened (Ch. 5), the transistor went three-dimensional (Ch. 6), and the making opened its door (Ch. 7). So where is all of this heading? In this chapter, just before the last, we go to see the hottest frontier running right now — the story of AI beginning to have a "body." This may be the most exciting place in the corner.
8.1 AI's evolution, in three stages
The AI boom lit the fire under semiconductors, we've written a few times. That AI is now evolving in roughly three stages. It can be laid out like this.
① Answering (inference)
The stage of answering questions and making text or images. Much of the AI we use daily is here. A "clever consultant."
② Acting on its own (agent)
Not just answering, but the stage of planning the steps itself and carrying them out. Toward "a worker who advances an assigned job on its own."
③ Moving in reality (physical)
The stage of carrying out judgment with a "body" in the real world. A robot's limbs, a car's wheel — AI steps outside the screen.
From ① to ②, and on to ③. What's been heating up especially in the world's semiconductor discussion lately is this ③ "Physical AI." AI is stepping out from a sage inside the screen into a being that moves a body in the real world. For chips, this means the arrival of a huge new "environment."
8.2 The chip gets a "body" ― Physical AI
Moving a body in the real world is far harder than thinking inside a screen. Sense the surroundings with sensors, judge in an instant, move motors, keep balance so it doesn't fall — all of this must be done without delay, on low power. So Physical AI calls for a device to run "the thinking AI" and "the body-control mechanism" together, on the same chip. And here too, a freely extensible architecture like RISC-V has begun to show its good fit.
A symbolic event. In 2026, it was reported that a humanoid (human-shaped robot) carrying a RISC-V-family chip completed a half marathon in Beijing. On two legs, like a human, running a long distance to the end — a scene once of science fiction is happening on a real chip. A clear example of Physical AI stepping out from "a lab's dream" to "a body that actually runs."
8.3 Robots, cars, and on to space
The stage of Physical AI is not robots alone. Chips are now trying to go out to every "real-world site."
Cars
Cars that assist driving and, eventually, drive themselves. As a "running brain" that senses its surroundings and judges in an instant, dedicated chips are being developed worldwide.
Robots
Human-shaped robots working in factories and daily life. A chip that handles limb control and judgment together, on low power, becomes the key.
Space
For space chips that withstand strong radiation, too, the freely designable RISC-V is beginning to be adopted, with development advancing toward Moon and Mars missions.
The sage is stepping out of the screen — to run the roads, work at the site, fly to space. Each time a chip gets a body, a new use is born, and a new "species" of chip is called for. The "Cambrian explosion" we saw in Chapter 2 is spilling out into the real world — that is the scene at today's frontier.
8.4 Why even nations get desperate ― semiconductor sovereignty
Come this far, and a chip is no longer one company's product but a nation's power itself. AI, cars, defense — all of it runs on chips. If so, then "whether you can design and manufacture your own chips, in your own country" ties directly to a nation's self-reliance. This is called "semiconductor sovereignty." This is why countries around the world are now working desperately to grow their own semiconductor capability.
And here, RISC-V (Ch. 5) tells. If the shared language is a particular country's or company's possession, there's a risk of the whole language becoming unusable through conflict or regulation. But a language opened neutrally, belonging to no one, means any country can make its own chips with peace of mind. "Opening the language" was not mere idealism; it was also a foundation for a nation's self-reliance. The opening of the design door connects, all at once, to geopolitics — that is the "weight" of semiconductors now.
8.5 The small chip at your hand, and the world, are continuous
Large matters have continued. Finally, let's pull the view right back to your hand. The chip that runs a humanoid, the chip that flies to space, and the small RISC-V stone you might run on a learning board — the "language" they speak is the same. The scale differs entirely, but they are connected on one ground: the same free architecture.
This is a remarkable thing. Once, leading-edge semiconductors were a distant world, up in the clouds. But now, the world's frontier and the top of your desk are continuous, in the same language. The "explosions" we've seen from Chapter 2 to Chapter 7 arrive here: "no matter where in the world you are, anyone can now join this large flow." In the next, final chapter, we receive the meaning of that, properly, at the last.