Windows 7 was even greater going from 14 down to 0.2 (yes, that is less than 1). For Windows 2012R2 (RDS), IOPS went from 9 per user to 1.
This is a simple concept and it had truly amazing results. As the ram cache is consumed, the blocks are written to disk in larger, sequential blocks.
Flash redirection enhancements Windows Media Redirection for Mac and Android HTML5 Video Redirection for server offload Lync enhancements including Linux and iOS Quadrupling 3D Graphics Density: Working with Nvidia Director and 6.5 details: Director supports troubleshooting IMA user sessions, so when a user calls in and has a 6.5 session, the admin can troubleshoot that user session with Director. As noted throughout the different slides, this 7.6 release continues to bring value to existing XenApp 6.5, this slide is simply a recap of all the new features and functionality available in XenApp 7.6 that can be applied to customers who have active SA for XenApp 6.5.It provides more capabilities than Web Interface Chrome Receiver and new features (printing, usb, clipboard, touch, webcam, 2 way audio) PVS Storage: the latest version of PVS includes some amazing storage optimization
However, even if you stick with 6.5 for some time, you still get enhancements from the 7.6 release even without changing XenApp.
However, if you have a goal of moving to 2012R2, then you should also move to XenApp 7.6 as the OS change will require you to rebuild your servers.