This reminded me a lot of Greg Egan's short Crystal Nights, which was also published in 2008. It's free to read too.

There's definitely a section about how there's a good chance they'll fold as a big business long before [hypothetical future technology that fixes everything] becomes available.

That's the literal meaning in greek, but I think the PoMind term also includes a distinct 'being experienced as a part of your mental process' aspect.

This piece of pendantry that would have ruined the joke if included is brought to you by me going on a light PoM binge after reading #Blindsight

The null reference syntax (x: 'T | null) has me itching for anonymous discriminated unions using an (x: Foo | Bar) notation. Or maybe too much TypeScript broke my brain.