This has been discussed, and you will see just as many post about why can't an LC be controlled by TMCC or Legacy. So I do think it is viable from a sales perspective. Allows LC/LC+ to be controlled by third source. May increase LC+ purchases by Legacy users while retaining the simple for Larry approach.
(Larry, I really wonder how hard this is for you considering how well you can manipulate computer software and create slide shows with notes and such.)
The marketing concern would be does this off set Upper end Legacy sales. Seems like it would be easy enough for Lionel to execute. G