Thank God. With a broken PS2 and broken 80gb PS3 ( replaced it with a slim), the ps2 is the only library I don't have access to, anymore. Now I'll be able to play every Nin, Sony,M$ console... Ever!

Not sure if you're aware but with profile set to not show to others it makes it impossible to just see the posts you've made, unless you want people digging through ever random thread you might have posted in with random bits of clues? Gotta say there is a point when dropping hints to a site is good and a point when it's just a chore for users of the site, what this posts suggests is very much the second one.

Right, but when it comes to backwards compatibility, I thought the issue was that the PS4 was just too far ahead of the PS3 for that to be possible. 

This is actually good news and might help persuade me to get one fairly soon if it works well. I have so many PS2 games but I don't want to be forced to have a PS2, PS3 and a PS4 hooked up to the same TV at once.
Backwards compatibility is really underestimated and it saves you a lot of hassle.

You can't be too far ahead :)

No console can emulate the PS3, I'd go as far as saying not even the most high end of PC today could emulate a PS3 at full speed.
The architecture is just too exotic (read: overly complicated and a pain in the ass to use even on it's actual hardware) to properly emulate.

Not to mention that the Cell BBE cpu actually runs faster for single threaded tasks than the PS4 cpu, significantly so.

The same goes for the Xbox 360, the XBO cannot actually emulate the game code as-is off of the disk, it doesn't have the horsepower and resources to do so, which is why even with the actual disk in the drive you still need to download the game.

Simply put, they have to do some relinking/hooking trickery to the primary executable in order to sidestep the main architectural differences and reduce the computation needed for straight emulation.

So let me get this straight. With the exception of the three earliest models, the PS3 can read PSOne discs and play digitally downloaded PSOne and PS2 games bought via PSN. Currently, Sony is telling us that there is PS2 emulation on the PS4, but we don't know whether it's referring to digitally downloaded PS2 games only or both digitally downloaded and disc based PS2 games. Now, we are hoping that it does refer to the PS4 reading PS2 discs plus trophy support. This is what I'm gathering, correct?

 Couldn't an i7x brute force it?  The clock speed is high enough, and contains enough physical cores.

All PS3 models can play select downloaded ps1/ps2 games.

The gen 1 ps3 had an actual ps2 like chipset inside giving it near perfect bc.

The gen 2 ps3 lost the chipset and used software emulation to manage partial bc.

Gen 3 and beyond could only play psn classics.

The ps4 appears to have a ps2 emulator installed (i told everyone that 3.0 contained this) that will be announced at psx.

Atm noone knows if it extends beyond ps2 classics.

Hypocrites, one and all. Backwards compatibility still isn't a system seller, though I'd be lying if I said I wasn't going to use it.