I don’t need to game from a coffee shop, but I only have one personal computer and am not interested enough in gaming to get a machine dedicated to just that

Airplanes and classic lan parties.

Gaming on an aeroplane is great, but that's a case where gaming-as-a-service is never going to work for obvious reasons.

LAN parties are great, but you don't need super-portable if you're packing for an all-day/overnight trip anyway. A computer that fits in a duffel bag is fine, and plenty of "luggable" gaming laptops qualify.

> Gaming on an aeroplane is great, but that's a case where gaming-as-a-service is never going to work for obvious reasons.

With current geo-synchronous satellites, correct. With the upcoming low earth orbit internet satellite constellations of which there are at least 3 announced and the spacex starlink constellation is literally launching their first batch of 60 satellites this week, this should be doable.

The new generation does indeed solve the latency problem, but will they have the bandwidth for gaming-as-a-service?

And people on phones/laptops while riding in cars/public transportation.

The whole point of a LAN party is to remove the internet and its associated issues from the network multiplayer equation. Streamed gaming from the cloud does the opposite.