I bought my kid the new Lego Batman II for PS3 in March for his birthday. We decided to upgrade to the PS4. He can't play this new game - that was recently released - on the PS4. It's a weird thing to not support backward compatibility IMO. It's a win for the developers/Sony but a loss for consumers. I have to now buy all new games and Lego Star Wars isn't going to be any better on PS4 than on PS3. Your question acts as though there should always be this "evolution" going on but I disagree. I like watching Daffy Duck from the 1940s - I don't like watching the Daffy Duck from the 1980s. Sometimes a game is "really good" and doesn't need revving - it just needs to be made available for the current gen console.