They've not released the official ones yet, But predicted (Who even predicted them?) are:
Minimum System Requirements
* OS: Windows XP, Vista or Windows 7
* CPU: Core 2 Duo 2.0 GHz or Althon X2 2.0 GHz
* RAM: 3 GB
* HDD: 15 GB
* Graphics: 512 MB card
* Sound Card: DirectX 9 Compatible
* DirectX: Version 9.0c
Recommended System Requirements
* OS: Windows XP, Vista or Windows 7
* CPU: Core 2 Quad 3 GHz
* RAM: 3 GB
* HDD: 15 GB free disk space
* Graphics: 512 MB Graphics Memory
* Sound Card: DirectX 9 Compatible
* DirectX: Version 9.0c
Also i only just saw this part
You can convince NPCs to travel with you, build relationships with them, get married, and even have your new spouse move in with you.. if you possess a home of course.
I really hope they do relationships better then fable.
But of course, Modders do everything better.