PS3 emulation is impossible on the PS4. I expect it will be impossible on the Neo.
While part of me would like it if PS4 put their full range of PS1 classics on the PS4, I do actually really enjoy the trophy support (I am less enthusiastic about the improved resolution, anti-aliasing, and frame rate, but that is personal preference. And they're not as detracting from the original experience as the regular artifacts you see on the emulation). I would love to play the original Spyros with the right analog stick to control the camera and trophies. Having recently replayed Spyro 3, I forgot how clunky it felt using L1/R1 to control the camera.
I would love it if the PS4 eventually gets a full library of PSP, PSV, PS1, and PS2 titles. But since it currently is building a PS2 library, I would like PS1 titles as well at some point.







