I was just about to install 19.04 when I found out that new release is coming just today. I was wondering if anyone of you know what time exactly is the release going to be downloadable. Thanks in advance!
It's out--everyone can go get it now!
Specifically, as of 2019-10-17 at 14:39 (UTC), all the files for Ubuntu 19.10 became available at that location. Soon afterward, http://releases.ubuntu.com/ was updated so it no longer referred to 19.10 as a beta.
Although the download page at ubuntu.com has not yet been updated to show it, it has been released, and the main website will likely be updated soon.