Hopefully a Qt 5.6.0 RC will be released this week. If all goes well, a final might be released within 2 weeks.
Qt 5.7 is now feature frozen.
Lars Knoll has started a thread: "Supported platforms for Qt 5.8"
http://comments.gmane.org/gmane.comp.lib.qt.devel/24938
Posted by Jon Trulson