The game being on PS3 was just a fulfilled promise; wasn't ideal. It will be much better on the PS4 given more (slightly better tech) RAM and roughly 2 Teraflops of processing power. Not exactly on par with some 4-8 Teraflop high-spec PC's but it will suffice to play this game.
I can't tell you how important it is that this game badly needs to be on PS4 because it has no future on PS3... A wasted investment.

The problem that will remain after PS4 comes out is the stress on the servers and network latency when being in these populated zones. That is up to SE to find a solution to.