The big thing for me is back in the day until around Xbox/Xbox 360 era, console games and PC games seemed to be completely different worlds.
Consoles exclusively had: Arcade racers, platformers, action games and JRPGs
PC exclusively had: Simulation, RTS, shooters, CRPGs
There was very little crossover, or when there was it didn't work very well. Good luck playing shooters and RTS games on old console controllers, by the same logic getting pads/sticks/steering wheels to work on PC was like a lottery.
Nowadays 90% of the games are released on all systems and PC has every control option available so easily (native 360 controller support for nearly every game for example), and the architecture is so similar that everyone ports their games to everything.
With modern distribution services like Steam and GOG, keeping games updated and patched etc is really simple too.
I just personally feel like PC and Console have become really homogenous to the point where I don't feel the need to buy a new console.
Compare this to the old days and I wanted a Dreamcast to play Sonic, Crazy Taxi, Skies of Arcadia et.al and I wanted a PC to play Half-Life, Age of Empires, Deus Ex, GTA2 etc. Neither could really provide what the other was giving.