You're probably right if you're considering the 80's. PC hardware was pretty awful... but in the 90's things really changed. Sure, your SMB, Zelda, Contra, etc type games were better on the SNES... but what about Sim City (and 2000), Civilization, Command and Conquer, Warcraft 1&2, Star Control 2, Ultima 6-8, Wing Commander, X-wing and Tie Fighter? All of these were amazing DOS games, and either didn't have console versions, or if there were, they weren't quite the same (the SimCity,Civilization and Wing Commander for SNES come to mind) Anyway, my point is there were many more games for DOS than just DOOM and Descent in the 90's. Maybe you didn't experience them, but there was a lot of good stuff.
I actually felt the opposite from you those days. I felt a lot of the SNES games were pretty much just rehashes of old stuff, maybe with a slightly better gameplay, but there really wasn't much original going on there, and I was generally bored pretty quick. Then again, I was a teenager, so take this with a grain of salt