I do not need backwards compatibility, people always talk of BC on consoles... i can not ever think of a time where i said.. ohh, i want to play that PS1 game on my PS3... or even a PS2 game on my PS3, just never happened yet. Maybe you guys like to play those old game again, i just don't get it. I get a new system and i get the new games for it. I think people complain about BC because in theory you are still playing your PS3 games and think you want to play them when you get your PS4?? ummm my PS3 and my PS4 will be hooked up to the same TV, compatibility issue solved.
PSN titles that wont transfer is annoying, but from a technical view, it makes perfect sense.. the architecture is so different that the games won't run properly... take Kings Quest 1 for an old 486 and put it on just a first generation Pentium computer (i did this btw) sure it ran, but man, it was just not right... same here for PS4... I think what should happen is that Devs should work to convert their games if they so see fit to do it for the PS4 architecture, then Sony should check if you owned the game, and if so, the new version should be avail to you for free or at a hugely discounted price....
But yet again, how many old games do you plan on really playing? You still playing your PS2 games on your PS3???