"It's amazing to think there are only 12 months between Wolfenstein and Doom. I wish we could still see leaps like that."
That is amazing. Some similarities to the home computer boom of the early 80s perhaps. Huge differences between products launched a year apart. I was lucky enough to have a Dragon 32 and an Amstrad cpc464. Admittedly, the latter was slightly more expensive and launched 20 months after the Dragon, but the difference was enourmous. Double the RAM, almost 5 x the MHz, much improved BASIC, larger keyboard, bundled tape recorder, monitor...
For that matter, look at the Sinclair ZX81 vs the Spectrum. An even starger contrast, only 13 months apart.