Horizon 6 GA Release Notes for the TL;DR Crowd

Yes, everyone and their dog has a post on this. Here is a post which cuts straight to the chase for those TL;DR people.

RDS will deliver individual applications installed on Windows servers to users over PCoIP sans thinprint and persona
Connect to hosted applications or desktops with the same client
All View server components now support Windows Server 2012 R2
View supports AD functional levels of 2012 and 2012 R2 for you bleeding edge and greenfield people
Integration with Virtual SAN (technically was in 5.3.1)
Pool entitlements get easier for those already doing GSLB multi-pod deployments
Video conferencing in View gets better with a new kernel mode webcam driver
Feature Pack from 5.2 and 5.3 are rolled into the install EXEs
Security/Connection servers can now service 800 HTML connections up from 256
Local mode that maybe .001% of customers used is gone and is officially replaced by Mirage
Buy Mirage? Get Fusion for free! Yay for Mac people
Heartbleed Fix