XenServer 7.2 is already here! Not a lot had changed since 7.1, which is pretty normal since the last release is only few months old.
Official Citrix XenServer 7.2 change notes are here.
The main thing is that 7.2 clear the road for a more "continuous release" cycle, providing more regular updates via patches toward future versions on 7.x branches.
Xen Orchestra is 100% compatible with XenServer 7.2.
You can download the fresh ISO here: http://downloadns.citrix.com.edgesuite.net/12636/XenServer-7.2.0-install-cd.iso
Check our blog post on how to upgrade to XenServer 7.2.