DM235 on 15 May 2015
Although I agree it would have been awesome if some of those titles were cross-gen, they were probably started in 2011 or even earlier, and it would have been risky to devote time / money / resources to do so.
Also, I think releasing those games provided Sony with a huge amount of goodwill. I am sure that many gamers saw how many games were releasing for the PS3 in its 7th year on the market, and compared that to Wii and X360, and it helped them either switch to PS4 or stay with Playstation.
