Fan boys? LOL. Pot. Kettle. Black.
Tablets are not limited to "Facebook style games". Perhaps you should actually have a look at the kind of games available. It's not just a load of Farmville type things.
Tablets and smartphones *are* having an effect on the handheld market, and tablets *are* having an effect on the PC market.
So what if the PS3 or 360 are "stuck in 2006"? They still produce excellent graphics, have excellent games, and still utterly wipe the floor with PCs when it comes to numbers of games sold (and cost, and ease of use).
Tech specs really are not the be all and end all. People like you care about them, but most people simply don't give a monkey's - certainly not enough to bother with PC gaming instead of console gaming (side note: another reason the iPad far outsells all its competition in the tablet market - most people simply don't care if a tablet can run Flash or has USB ports or whatever else. So long as it can do what they want - e.g. videos, browsing, games - and is easy to use, then that's perfectly fine for them).
Even if you build your own PC (something the majority don't bother with), it still costs more than simply buying a PS3/360/Wii, and you still need to spend more money on it in future so it doesn't get left behind and become unable to play the latest games.
Consoles are cheaper, and you don't need to upgrade them. A 360 bought in 2005 or a PS3 bought in 2007 can still play the very latest games, which will still look and play great.
Can a PC bought over four years ago - and not upgraded since - play Black Ops, or Deus Ex: Human Revolution, or Batman: Arkham City, or Battlefield 3, or various other games out this year or last year? And how would it compare to the graphics on a 360/PS3?
Newer games are too much for the PS3... In what way?