In 3.6 the "vm.display" element and its sub-elements have been superseded by the new "/vm/{vm:id}/grahicsconsoles" collection, but the original element was preserved for backwards compatibilty. In 4.0 this old "vm.display" element should be completely removed.
Target release should be placed once a package build is known to fix a issue. Since this bug is not modified, the target version has been reset. Please use target milestone to plan a fix for a oVirt release.
As version 4 of the engine has to support version 3 of the API it has been decided to not remove this.