According to Ubisoft the PC version of Watch Dogs 2 is getting delayed to ensure that specific PC enhancements are there from day one. According to the post over at Ubiblog, "Support for full 4K resolution with Ultra Textures and Extra Details options; an uncapped framerate; and a host of other features and options specifically requested by the Watch Dogs 2 community" are the main reason for the delay. Which means a new release date of November 29.

Alongside the delay, Ubisoft also release the PC requirements for Watch Dogs 2.

Minimum

• Supported OS – Windows 7 SP1, Windows 8.1, Windows 10 (64-bit versions only)
  
• Processor - Intel Core i5 2400S @ 2.5 GHz | AMD FX 6120 @ 3.5 GHz
  
• RAM - 6GB
  
• Video Card - NVIDIA GeForce GTX 660 (2GB) | AMD Radeon HD 7870 (2GB) or better
  
• Hard Disk Space - 50 GB

Recommended

• Supported OS – Windows 7 SP1, Windows 8.1, Windows 10 (64-bit versions only)
  
• Processor - Intel Core i5 3470 @ 3.2GHz | AMD FX 8120 @ 3.9 GHz
  
• RAM - 8GB
  
• Video Card - NVIDIA GeForce GTX 780 (3GB) | NVIDIA GeForce GTX 970 (4GB) | NVIDIA GeForce GTX 1060 (3GB) or better | AMD Radeon R9 290 (4GB) or better
  
• Hard Disk Space - 50 GB

As per the reasoning for the delay it looks like Ubisoft is taking the PC version very seriously, as it will feature the following graphic enhancements in addition to full and customisable keyboard/mouse controls.

4K support

Stuttering/lag framerate optimization – We employed a fix that makes all controls much more responsive and less framerate-related. We’ve optimized resource creation, GPU VRAM upload and required VRAM for the game.

No FPS cap

Full SLI/Crossfire support at launch

Multi-monitor support with borderless mode and advanced settings that allow for customized placement of menu and HUD.

Multiple windowed mode options – Windowed mode with flexible/resizable windows, multi-monitor borderless.

Screen Space Reflections

Headlight Shadows – Support for additional shadows from car headlights

Extra Details Options – Increases the level of detail for all objects in the game, and adds more details to objects in the distance.

FOV sliders

Pixel Density sliders

Sharpness sliders

Ultra Textures pack available at launch

Anti-aliasing options: TXAA, MSAA

Post Processing Anti-Aliasing options: SMAA and FXAA