Oh goodness, that's a tricky one. If I was being trite I could claim they're all equally important links in a chain, remove a single one and we wouldn't be where we are today.
Being more serious, I'd say either the 8-bit era for rebuilding gaming after the early 80s crash, or 32-bit for the transition to 3D. Another honorable mention would be Gen 6 for bringing broadband multiplayer and online functionality into the mainstream. It's also depressing how relatively stale 7th and 8th Gen have been. The biggest contribution of 7th Gen was achievements/trophies and HD; 8th Gen hasn't even hinted at any genuine innovations yet.
I voted 32-bit, although I would only play most 32-bit games at gunpoint. Early 3D has aged REALLY badly. My favourite eras are 16 bit and gen 6-7.
Being more serious, I'd say either the 8-bit era for rebuilding gaming after the early 80s crash, or 32-bit for the transition to 3D. Another honorable mention would be Gen 6 for bringing broadband multiplayer and online functionality into the mainstream. It's also depressing how relatively stale 7th and 8th Gen have been. The biggest contribution of 7th Gen was achievements/trophies and HD; 8th Gen hasn't even hinted at any genuine innovations yet.
I voted 32-bit, although I would only play most 32-bit games at gunpoint. Early 3D has aged REALLY badly. My favourite eras are 16 bit and gen 6-7.