No, Plus hasn't forgotten about the PS4, silly billy. Sony's newest console is getting asylum horror Outlast on Plus next month, but we already knew that. The real question is when: PlayStation UK's website says next week on February 5, so going by PSN traditions that'd mean a February 4 showing in North America. We'll find out for sure soon enough.
Looking at the PS3 games specifically, we'd recommend checking out the "suffocating despair" of shooter sequel Metro: Last Light - no really, it's fun! - and the heist-em-up capers of Payday 2 if you haven't already have. As for Remember Me? Well, if you like neo-action games full of neo-jargon, then sure - but maybe read Ludwig's neo-review first.
Sony PlayStation 3 (late 2012)
Sony PlayStation 4