I don't think anybody is going to have any kind of real answer for you since it'll have to happen to several people to nail it down. Even so I kinda doubt you'll have a problem since the PS3 is built way stronger than the PS2 ever was. I've been using the hell out of mine for a year now and it runs like a top but with my PS2 after about 6 months of using it as a dvd player it started making funny noises, never died tho.
PSN ID: WAR_MACHINE77 Wii friend code: 7186 4304 6064 5134 Gamertag: WARMACHINE mk2