Resolution increased to 2880x1600 (from 2160x1200) 78% increase
New redesigned headstrap with built in headphones
Uses SteamVR tracking 2.0 (new lighthouses)
Two front facing camera's
Price and when it will be available havnt been announced yet.
https://www.theverge.com/2018/1/8/16863304/htc-vive-wireless-adapter-features-ces-2018
The vive wireless adapter will work on both the vive and vive pro
Pricing has not been released yet, but expect a summer release.