Skype - The Big Blog - Welcome Skype for Windows 8: It's Fast, Easy and Beautiful

tbd if any of the features will be Windows 8-exclusive

"Skype for Windows 8 is almost here and we are incredibly excited by this important new version of Skype. This is our big step forward together with Microsoft to introduce a completely new Skype experience, which is designed to be always on, immersive, effortless and fun to use.
The team at Skype has been building on the Windows platform since the first release of Skype. With Skype for Windows 8 we've focused on how people are using Skype today, and re-imagined Skype for everyday communications across our global community."

Skype - The Big Blog - Welcome Skype for Windows 8: It's Fast, Easy and Beautiful