Product : Citrix, XenServer/7.3, Enterprise
Feature : Automated Live Migration, VM Mobility, VM Mobility and HA
Content Owner:  Roman Macek
Summary
Yes Workload Balancing
Details
Workload Balancing (WLB) which was reintroduced in 6.5 is now enhanced with XenServer 7.x
Workload Balancing 7.3 is supported on XenServer 7.x and now has an enhanced WLB audit log session reuse with XenServer 7.3.

Details here: http://bit.ly/2sK6siq