I am happy to inform you we have released Qt 5.15 Alpha today.
Qt 5.15 new features page is listing new features etc coming with Qt 5.15 release. But please remember it is still under construction and some items are still missing. The Feature list should be complete by beta release coming within a few weeks.
Please start testing Qt 5.15 Alpha immediately & report your findings to jira. Your feedback is essential in our journey towards Qt 5.15.0 release.
Even Alpha is src only milestone we are delivering pre-build binaries via Qt Online Installer as well. So you can update Qt 5.15 Alpha to the existing Qt online installation by using maintenance tool or do clean installation by using online installer. Source packages are also available for commercial users in the Qt Account portal and in the download.qt.io for open-source users.