i didnt like 80s PC games. Mid 90s were great, and i definitely think they have went down, but not because of technology, if anything we have more amazing games today on pc than ever (and no, 3 months isnt enough to outdate your pc lol). you always needed state of the art stuff to run the newest pc games... just that 20 years ago, the leaps were less frequent. however games like baldur's gate (1 and 2), C&C 3, HL2, CS:S. Titan quest etc etc, simply were not possible before. and sure some have console counterparts, but the pc version always excells.
i think what changed was the business of making games, not pc gaming in general. if before it took an upstart of 15 guys to make a great great game, today it takes 50 + millions of dollars. the talent from then is now gone, disenchanted by what corporations did to their development studios (bullfrog, origin, Id, SSI, Maxis, Sierra etc etc). and new talent cant rise as fast and easy, and their ideas get stomped for what is 'safe' to produce instead of something new. pc gaming didnt suffer anything console gaming did. in fact i believe it is the last beacon of entertainment that isnt shoved down your throat by Sony/MS/Nintendo etc. as for the mainstream pc stuff, well it still outdoes the consoles, and if you dont like tweaking then honestly, pc gaming isnt, and never was, for you.
the pc always has and always will be my choice hardware, and id give all my consoles up before i give up the pc.
let us not forget, the pc IS the ultimate backwards compatibility machine. for pc stuff, AND console stuff.