Normally, you'll get the notification of updates on the back-end the products you installed. Besides, you can download the latest version of the product in the download area.
It depends on the number of users and request for updates. When Magento is updated to the new version, all of our products will also be gradually updated to be compatible with it.
We will show the latest information about product updates in our newsletter, blog and other social network channels. Furthermore, you can see the latest update version on the product detail page.