Developers have created too many layers of abstraction and indirection to do their jobs. We're burning a ton of energy managing state management frameworks, that are many layers of indirection away from the computations that are salient to users.
All those DSLs, config syntaxes, layers of boilerplate waste a huge amount of electricity, when end users want to draw geometric shapes.
So a non-dev generates a mess, but in a way so do devs with Django and Elixir, RoR, Terraform. When really end of the day it's matrix math against memory and sync of that state to the display.
From a hardware engineers perspective, the mess of devs and non-devs is the same abstract mess of electrical states that have nothing to do with the goal. All those frameworks can be generalized into a handful of electrical patterns, saving a ton of electricity.
Microsoft has been trying to corner Valve. Valve is finding clever ways out by getting developers to finally make their games Linux compatible.
If Valve's consoles become broadly successful, that's an added bonus. The real win is to outflank Microsoft.
One of Microsoft's biggest mistakes was to give up on Windows Phone. One of Meta's biggest mistakes was to give up on their phone (they gave in early due to technical choices, not just lack of user demand).
Owning a "pane of glass" lets you tax and control everything. Apple and Google have unprecedented leverage in two of the biggest markets in the world. Microsoft wants that for gaming, and since most gaming is on Windows, they have a shot at it.
Valve is doing everything they can to make sure developers start targeting other platforms so PC games remain multi-platform. It's healthy for the entire ecosystem.
If we had strong antitrust enforcement (which we haven't had in over 25 years), Apple and Google wouldn't have a stranglehold on mobile, and Microsoft would get real scrutiny for all of their stunts they've pulled with gaming, studio acquisitions, etc.
Antitrust enforcement is good for capitalism. It ensures that stupid at-scale hacks don't let the largest players become gluttons and take over the entire ecosystem. It keeps capitalism fiercely competitive and makes all players nimble.
The government's antitrust actions against Microsoft in the 1990s-2000s was what paved the way for Apple to become what it is today. If we had more of it, one wonders what other magnificent companies and products we might have.