The only thing I can think of that wouldn't work with it would be ink incompatibility - if you printed onto the special transfer paper you'd think it could be possible - but I don't know anything about the
DTG inks vs. plastisol when it comes to the transfer process. Like I said, it would be awesome if it worked!
Hauling around, setting up, and trying to do shirts at a show with a
DTG the way they are now sounds like a nightmare. :< Maybe the technology will continue to improve in the future - or maybe someone will be able to do
DTG transfer prints!

I would imagine if you could do the
DTG transfer prints you could compete insanely with the 4 color process people right now - they charge so much for the printing.