Don't take my word for it but I am pretty sure it is one of the following reasons or a combination of :
1) Microsoft/Sony paid them to have all systems basically look the same. For marketing purposes. In this case it would likely be Microsoft. (maybe, but unlikely)
2) E3 builds were isolated scenarios where they pushed the limits of the engine to deceive people. Like the same with The Witcher 3. When it worked well in a small environment but when they scaled it up it just didn't work. (very likely)
3) They want to sell the game to a wider audience. They don't care for the 1% of people with 980 Ti SLI rigs that buy the game. They want to money from the 90% of people that play with a GTX 760 or Radeon 7870. (very likely)
4) Can't be bothered with putting all the work hours into optimizing a PC port with graphics that completely surpass the consoles when in the end they only sell 1-2 million PC copies anyways no matter what the graphics look like. Most peoples are sheeps in terms of buying habits. They don't care for stuff like that. (super likely)
5) They started development before the consoles released and the console dev kits were much more powerful than the actual consoles. (likely)
What I say happened :
They started developing the engine and game and cranked everything up and put everything in it and it looked beautiful. They thought when they continue working on the game they could make the final version of the game look like it and include everything they planned -> This never works. Game developers always cut basically 50% of every game. They always start with higher ambition and settle for less. Especially in huge studios that do AAA games.
Then the console released and they were much worse than they thought they'd be. They realized they couldn't make it happen and downgraded the game. Having a PC version much better would require extra work and then still only run for the 1% of PC gamers that have beefy rig. Look at me. For OCN standard I have a bad rig (OC 2500/OC 290X), but compared to other gamers I have a PC better than 95% of the people. And I still can't max out the game. I wonder what it'd be like if it looked like the E3 trailer. Then It'd run at like 5 fps maxxed out especially since they don't have the resources for perfect optimization. No game basically ever is perfectly optimized for PC.
Basically they realized what every game developer with good intention realized. God damn we can't deliver on what we showed. Since they can't admit it, because it would hurt sales they have to deny everything and stay silent.
Edited by zealord - 2/1/16 at 11:08am