Consoles are for the most part more reliable. I spent a fair bit of money on my computer, getting a good processor and graphics card, and I still struggle playing a lot of games. Consoles on the other hand, particularly the PS3 since 360s have that ring of death thing, always work the same way, don't need upgrading to play any games and its performance doesn't decrease when you clog it up with games.
I like the PC for many things, but now with my PS3 in my bedroom it's definitely my gaming device of choice.