Microsoft this week revealed that many games from its old Xbox 360 console will be playable on its newer Xbox One later this year. But, don't expect rival Sony to follow suit with a similar announcement anytime soon.

This idea of "backward compatibility," in which gamers can play older titles on a new gaming system, is a big benefit for players, since it means all their favorite games from years past aren't made obsolete when they trade in their old console for a new version. This feature can also help gamers save money, too, because they don't have to repurchase old titles that work on the new machine.

Phil Spencer, the head of Xbox at Microsoft, said at the E3 gaming conference this week that backward compatibility was one of the most requested features for Xbox owners.

Yet, even after Microsoft pulled off that feat for its Xbox One, Sony seems unlikely to do the same for its PlayStation 3 and newer PlayStation 4, according to an interview Eurogamer published Friday with Shuhei Yoshida, president of Sony Computer Entertainment Worldwide Studios.

"I didn't think it was possible. There must be lots of engineering effort," Yoshida told Eurogamer about the Xbox backward compatibility.