Yea, I saw the trailer on unreal 4, it's a huge difference.
Even if it's still not perfect, you don't recognize the game back, it's really high advancement of graphic and physik.
Hope they'll get rid of the sudden fps drops which hapens on some places for no reason, too on the new engine.
Even though the actual game was created of one of the first versions of the unreal 3. There are indeed later modiefied versions which working and looking better (see on Bioshock Infinite), I never would have thought of this.
But this is one chance to let the game be still alive- especially because they made some severe gameplay mistakes already which many players made to quit.
But PC specs will also increase up most likely, I think about 5-6gb Vram, maybe if they'll put in DX12 can be even more, depending on which resolution you are playing.