1. Are the textures redone? (higher resolution)
2. Rotating turrets? (If no, then maybe with a future update?. and why wouldn't it be possible?)
No, but really the lighting does help out with making the textures look much better.
They've refused to do rotating turrets from day one because having lots of independent moving parts on each of the thousands of ships in game would be too much for your poor processor.
3. New maps?
There was supposed to be, but we haven't seen them in the Beta yet.
4. Do the graphics look allot better then Trinity? or it is about the same?
The shadows, lighting, shadder and particle effect updates are a noticeable improvement over trinity. Its not a quantum leap but its certainly noticeable.
There are some new ships, like a new capitalship for every race, and a new corvette class frigate that acts a bit like a fighter. Also each faction now has two subfactions with different strategies and specializations available to them.
That said, the final list of what it will include is unknown. This interview basically has all the features that were ever promised, but not all of them have appeared in the beta yet. Its not clear if they will be added in a later beta, if they'll be added after release (patch or DLC), or if they've been canceled.