That is just speculation at the moment. Adding trophy support and HD rendering to old classics would make them closer to ports than to emulated games.
Sony would include the basic emulator in the dev kit and each publisher would need to port the game, tweak the code and adjust settings to make it work properly on the emulator with a decent frame rate, add trophy support and republish the game. That also means starting from zero with the list of available titles.
So a really different concept compared to the idea of an emulator where you use the old code as it was and the emulator does all by itself.
For now about the Star Wars PS2 games I'd stick with the official line, they are PS4 ports with HD graphics and trophy support.