@ll_exile_ll: It bothers me because there's no good reason backwards compatibility isn't available on said system. They even use the same proprietary format. It's greed, pure and simple.
Are you talking about PS4? Because if so you have absolutely no idea what you're talking about. Having the same disc format has nothing to do with backwards compatibility. The hardware architecture of the PS3 is incredibly complex and notoriously unintuitive to develop for, taking emulation off the table as a backwards comparability option. The only other option to get PS3 backwards compatibility onto a PS4 would be basically shove PS3 hardware into the console itself, which make the box much larger and probably about $100 more expensive.
Anyway, you bringing up backwards compatibility shows you completely ignored what I said. Don't view these ports as things people that already have the game are meant to be buying again. The games are being put on systems that they weren't on previously and people that have those systems can now buy them if they didn't previously have access to them. I just don't get this idea that a port of a game shouldn't exist because it's already available on another system.