Ubuntu will soon offer Chromium browser as a snap package instead of a regular deb package. This is not only for the upcoming Ubuntu 19.10 Eoan Ermine, but also for the already released Ubuntu 19.04 (Disco Dingo), and for LTS releases, like Ubuntu 18.04 (Bionic Beaver).
For a fist step, the Chromium deb package in Ubuntu 19.10 (Eoan Ermine) has been updated to install the stable snap on both upgrade or a new install. Once the transition is fully tested, "it will be rolled out to stable releases, starting with disco and then the LTSes".
After this, Chromium will no longer be available as a deb package for Ubuntu users, installing the snap package being the only option.
Ubuntu developer Olivier Tilloy mentioned that the transition from deb to snap is not being debated though, as it's "a firm plan that will eventually save a lot of engineering, builder and maintenance resources by removing the need to build every new version of chromium on all supported Ubuntu releases".