Genuine question - do "retro" video games really exist any more? When I started reviewing "retro" games in 2007, Mario World was 16 years old. That's how old New Super Mario Bros, Minecraft, Demon's Souls, Uncharted 2, Arkham Asylum, and RE5 are now. Are they considered "old" but not “retro"?
I had thoughts in this genre when Nirvana started appearing on the classic rock station. Growing up, the station mostly played stuff from the 50s and 60s. Now it's 80s and 90s. There's really only two main "bands" (in the EM spectrum sense) of classic rock.
Gaming is where rock was in the 80s: new enough that the first people to experience it were still around. As that shifts, I expect defining it will lose importance. It mattered more when there was only one band of retro. A little less with 2-3. No one will think about it after a century of Zelda.
Also: there's a retro sense for games like Minecraft, but the nostalgia is for versions. I didn't get this until I watched Minecraft YouTubers talk about 1.7 or Alpha the way I think about Link to the Past. You might know the phenomena from MMORPG players preferring certain versions from the past.