The existing unit will likely not have any more changes made to it. Have you seen the new decorative covers that hide the T5 wires and the LED wires?
The new white units will have the decorative covers included as we figure these will be out in the living areas and will need to hide the cords.
The "in process" dimming hybrid unit will have a single power cord with 0 -10V input. Since this unit would be fully assembled we would have the single power cord. However it will not be adjustable like the current unit is, as the wires will be running through the ends of the fixture. So it will be fixed at the 18" width and all the existing 18" hybrid fixtures parts will work with the fixture. Just can't adjust to 16" or 23.25".
Thanks for the input. Are you running a peninsula tank?
I am not, I've bounced around on a couple of the different active threads about the hybrid option. I have a 30 inch cube that I plan to use a stand mounted rail system to run the wires down each of the rails.
The dimming hybrid sounds like a great option that I will hold out for, thanks!