However glasses, a mini PC, keyboard and battery is smaller than a laptop.

It relaxes the X and Y dimensions

no screen. But it might take up more volume, depending upon the configuration. Like, laptops use flat keycaps and scissor switch keys to save space. He's using a keyboard with traditional, full-height keys and regular keyswitches. That alone is a not insignificant amount of volume.

EDIT: I have a split-ergo keyboard with standard full-size keyswitches that fits into a folding case, one half on each side. If I were going to carry an external mechanical key keyboard with a portable PC, that's probably what I'd use. Split ergo keyboards are expensive, though, so not as cost-effective as a standard one-piece mechanical key keyboard. !ergomechkeyboards@lemmy.world