In the early 90s I could classify myself as a PC gamer. My parent did not buy us any consoles and us kids didn't have much money. But my Dad had to have a decent PC for his job so until we saved up enough for a SNES that was our de facto videogame system. We played a lot of shareware games like Commander Keen, Scorched Earth, Wolfenstein 3D, and Doom. Althought this isn't a good thing piracy was real easy back then so if one of our friends got a game everyone in the circle got a copy. I got to play a lot of stuff and even after getting a SNES I still played a lot of PC games.
Some of the best things about PCs back then was then when you got a new PC EVERY PC game in existence worked for it. These days the default graphics cards with brand new PCs won't work with current games or even some older games. My family bought a new PC and now I could play Warcraft II without any hassle. You also had near perfect backwards compatibility back then. Prior to XP it so simple to get old games working. Now you have to fart around with DOS Box and all sorts of workarounds. PC gaming has gone from being a pasttime to a full-on hobby. It takes effort, time, and money to keep up with PC gaming and I don't have the patience anymore when consoles are so easy. I think the effort to be a PC gamer is what has caused the rift. PC gaming is going to attract more, well, geeks while consoles are going to attract more of the mainstream.
When I was a kid my dream console had four controller ports, a mouse, and a keyboard. Around 1994 that seemed like the ultimate game console that could play anything.
One thing I don't like about PC gaming today is that there are less genres than before. Now we just seem to have FPS, MMORPG, RTS, and tycoon style games. There used to also be flight sims, graphic adventures, platformers. I think there are some types of games that have been so neglected that re-introducing them could result in some killer apps.
I'm surprised no console has ever had a standard mouse, though I guess with the Wii it isn't needed as much as it was.