The other issue here will be the transmission 'characterization'.
You see, with past automatics you had solenoids in the transmission that actuated spool valves to direct the fluid to complete a shift/ect. These solenoids were precisely wound and had a very specific resistance (number of windings=strength of magnetic field produced which equates to how far you move the spool valve/pintle). What does this mean exactly? You could pretty much put 12v and ground the specific solenoid in the trans on the older transmissions and get it to shift and shift right. This is how the aftermarket controllers essentially work for the 4R70W/ect. They use inputs from the throttle/ect, and simply ground the solenoid(s) needed to select a gear.
Fast forward to 2011+ 6R80 units (and other current Ford transmissions). Now, the game has changed. Solenoids are still used, however to save manufacturing costs they are NOT built with precise windings. What does this mean? Reduced production costs. Now, the O.E. manufacturers thought of a GREAT idea.....make solenoids with a much more wide electrical specification, and we'll change how much current we run through them to alter their movement (remember, less/more windings=more or less magnetic field and therefore movement on the shift valve).
So, what this boils down to is on the 6R80, the PCM controlling it must be programmed to the specific set of solenoids in THAT particular transmission. No two 6R80's will usually have the same combination of solenoids resistance wise.
I believe this is where part of the stumbling block for the aftermarket has been. IF you simply throw a 6R80 into something without programming the transmission's 'characterization' strategy into the pcm, the shifts will be too hard/soft/slip and it shifts/flares like crazy.
Those of you that know about my Marauder/Coyote/6R80 swap will see how I circumvented this. I used the stock Coyote PCM AND matching 6R80 from the same donor vehicle. Although, I have the ability to program any trans strategy if I ever had to change it out for some reason (it's actually only the main control/TCM that causes the need to update the trans strategy).
I'm very curious to see how the aftermarket controller will function once it comes. Someone will make one, but my question, can you bolt it up to any old 6R80 and get it to shift as smoothly as a stock vehicle, yet get the tire shredding shifts at wide open? Or, will you be stuck with using it in a 'kit' with only their transmission that will possibly have a unique valve body for their controller?
As far as a retro kit, i'm sure it will happen in time as well. Transmissions are simplistic in nature, they simply have solenoids that will apply whichever gear they are told, so it's a matter of time before this trans becomes more popular and a company gets the R&D time to make such a device.
But my concern, will always be and as those that have a stand alone controller for the 4R70W, will they ever get them to function as smoothly and as silky as using the stock PCM/controls? That, is the biggest thing I would worry about.
