Well, if a group of unknown people on PC can build an emulator and get it working against all odds, then there is no chance in hell that the best Sony engineers won't know jack about this stuff. It's very clearly a cost-to-benefit decision. Even PCSX2, which has been around for ages now, isn't completely perfect but it's very close to it. The level of commitment these people have shown to support these emulators is insane. Same goes for the development of the PS3 emulator. They literally post update videos and explain the changes in each revision these days. Obviously, this would take a lot of time and effort (and money) for Sony which they would be absolutely hesitant to spend at this point. They'd quite possibly need to have a dedicated division made specifically towards this task. Not to mention the amount of testing for QA that would have to go into such a program to ensure that it's in playable condition.
The only realistic chance I can see at this stage for a proper PS3 emulation would be the PC emulator development. Unless Sony plans to remaster their entire first party library from that gen, fat chance we'll see massive progress on the backward compatibility.