Here is the press announcement of the new Nikon UT-1:
It seems to me to do little more than what the WT-5 currently does.
BTW I have the WT-5 in conjunction with the Nikon D4 which I find hardly worth having as it is both slow and difficult to configure.
Perhaps it is the 'missing link' which will make the (£500) WT-5 work properly. If so, I will be less than impressed.