The word direct from Ubisoft is that the PC version of the game has been delayed to the 29th of November. According to a blog post this extra time is going to be used "for additional polish and will help ensure the game runs smoothly across a broad range of PC hardware."
They are never bad things when it comes to a major release on the minefield-like PC system, so we're going to go ahead and say this is good news. The post also confirmed the minimum specs for the game, along with expected but welcome features like 4K display support, no frame rate cap and extra graphics options.
Supported OS – (64-bit versions only)
Windows 7 SP1, Windows 8.1, Windows 10
Intel Core i5 2400S @ 2.5 GHz | AMD FX 6120 @ 3.5 GHz
NVIDIA GeForce GTX 660 (2GB) | AMD Radeon HD 7870 (2GB) or better
Hard Disk Space
Windows-compatible keyboard and mouse, Microsoft Xbox One Controller, Dual Shock 4 Controller
256 Kbps or faster broadband connection