http://www.phoronix.com/scan.php?page=news_item&px=Ubuntu-15.10-DEB-To-Snap
I just read that the next version of Ubuntu (15.10) and future versions will move away from the .deb format in favor of their home grown Snappy container format. I don't know how this will affect Trisquel and if Trisquel will continue to use .deb or adapt the new format.
If you want more info about Snappy, you can check out http://www.markshuttleworth.com/archives/1434 but I am not sure about licensing. I'm guessing it will be the same as Upstart where they will use a draconian CLA and force you to use a copyleft license while they re-license it under a non-free license for their phone and corporate partners.
