Last October DCL made a big deal about a press release that basically said you could now check your bags all the way through from outside your room to your home airport. We all got excited and they even referenced "Participating airlines only" and went on to list them.
I personally booked my own air through AA so I could take advantage of this. Then people started calling and found out if was for DCL transfrers only.

Hello, isn't that pretty much what they have always done for DCL transfers?
Anyway, it made a lot of us mad since it was presented as a new really great new option.
This appears to be their modified version of the original plan. No mention of "Participating airlines" and it even says it is good for those who use book "independent" air. That's me!!!
Now if THIS one pans out, we will not have to lug 6 peoples luggage for 15 days out of the port, to the rental car bus, into the rental car, out of the rental car and into the airport. Just set it out the night before, and do not touch again until I get back to Dallas.
We'll see what changes in the next 7+ months.
I am curious why this announcement would make you more likely to book DCL transfers. To me this eliminates the hassle of handling your own luggage that you have to when you do it yourself- therefore increasing the benefit of doing it yourself.