This post, gives you the overview of new Page model in SharePoint Modern UI and how to create from SharePoint site & where it is available.
This post explains how to use the PnP JS library to retrieve subsites from SharePoint and style the content using Office UI Fabric core component.
This post contains the common URL locations to the modern UI pages in SharePoint.
I have detailed my experience with additional features available in Site Hub content section from Site Contents page in a SharePoint modern UI update.
This article explains how to become the first user to get the latest updates from Office 365 environment
Now a days, Office 365 tenants are getting UI changes to the SharePoint sites. So, far I have received UI updates for the Site Contents and Document Library pages on my trail Office 365 account. In new UI design on those pages,
This post shares my first experience of SharePoint Document Library in modern look
This post covers the Modern experience UI for Site Contents page in Office 365