I remember playing Tetris 3D and Wolfenstein 3D for hours and hours. With the intro of the 486 from Intel and the CD-ROM, things became even better. More and more games flooded the market, with games like Doom to show the way. I won't even try to list even a friction of them. Configuration has become much easier, with semi-plug and play hardware and more intelligent setup programs.
Graphics is quite good, with sound even better than the consoles.
Even with a Pentium 166 and a descent 3D accelerator, Wipeout XL, Descent II, Tombraider and Quake look gorgeous. Whereas the PC evolves continually with faster and faster processors, better and better graphics cards, more and more memory etc. Only better libraries and brilliant programmers can get more juice out of the machines. Add-on hardware have been contemplated by most manufacturers, but horror stories like the Sega 32X makes such adventures highly unlikely. Nintendo, being stuck with the obsolete cartridge format, has to do something.