New games out for PS3
Sony has stated it will support the PS3 for 10 years. Way back in 2006 Sony did promise a 10 year lifespan for it then new console. The Playstation 3 debuted a cost of a whopping $600.00 for the premium model. And $500.00 for the low end model.
At the time the price didn't go over so well. Sony did state that PS3 would be supported for 10 years. So 2016 will be the year Sony makes good on their promise. 2015 and 2016 should see that last of Sony and 3rd party publishers support for the PS3.
The Playstation 4 has sold 13.5 million and may reach an even 14 million in it's first year on the market. So I would expect support for the PS3 not to last much after 2016. Sony will be keen to focus on the PS4. The years of 2017 and 2018 should see very limited 3rd party releases for PS3. Sony will have stopped making games for it after 2015. But budget games by 3rd parties and sports games will all that will be left during 2016, 2017, 2018
So you could catch up on PS3 games you may have missed over the years. But major game support for PS3 should more or less end after 2015. PS3 will get games up until 2018. By then most people will have switched to PS4.