Citrix released today XenApp 7.6 on Citrix.com, so it’s downloadable now.
One of the big advantages of this version:

1. The use of MCS (Machine Creation Services) for XenApp, which first was available only for XenDesktop (VDI).  This option gives more flexibility for deployments. Now you can choose between PVS and MCS.
2. Better Mobile experience (enhanced codecs for instance) and use of onboard hardware for higher refreshrates.
3. Better 3d experience by separating HDX channels with 5 seperate streams.