While I'm not a fan of Vista, as I've said many times before, there is no difference between software that runs on 7 as compared to software running on Vista. They even use the exact same drivers (despite companies rarely admitting this). Windows 8 didn't change much either under the hood despite the differences in UI for software and drivers. Windows 8.1 changed some things, but actual software support is generally identical (again, despite some companies claiming otherwise and thus lying).
Windows 10 is the only Windows OS since Vista that significantly changed software support and that's mostly related to implementing DX 12 support, so graphics drivers actually did need to change even if you only play DX 11 games.
Supposedly ending Vista support does absolutely nothing for improving security for the client on a newer OS at least until Windows 7 support ends and I doubt anything important changes until Windows 8 support ends.