For me the PS3 is still a fantastic 3D-BR player and 3D capability I must have. I'm not saying there aren't better 3D players out there but since I already own one that performs great for my purposes I've no need to replace it. Then coupled with PS+ and the "free-ish" PS3 games I get every month, welp to put it plainly my PS3 draws electricity on a regular basis.
On the subject of the PS4, I must admit I was initially highly skeptical of claimed improvements for Tomb Raider Definitive Edition. I first played TR on the PS3 thanks to PS+ however my buddy loaned me his DE last week. After spending a good 15 to 20 hrs with the DE I am now fully in the camp of "holy effn wow this game and protagonist (O.O) look awfully good in full 1080P!" Smooth as butter gameplay as well. It's a damn fun and tight game, I'm rather grateful that someone finally convinced me to give it a chance.