The issue is the trade-off with performance though, that'd make it even more of a niche device. And almost all games are x86 only so either you need to do that

The issue is the trade-off with performance though, that'd make it even more of a niche device. And almost all games are x86 only so either you need to do that opcode level conversion too (on top of the Windows / DirectX APIs), or limit yourself to only ARM games (realistically mostly FOSS games). Apple has done it well for M1/2 to be fair, but it's far from easy. So you could get much better battery life but it'd be very niche.