The main capabilities of SharePoint 2010 has six categories like: Sites, Communities, Content, Search, Insights, and Composites.
The major thing that come in SharePoint 2010 is the enhancement of Ribbon UI, dialogs, web parts, silverlight and also support in different browsers.
Now also you can manage offline content with Microsoft office.
The Communities category contains features such as social networking, information sharing, content tagging and rating, and user feedback collection capabilities.
Besides it has also features like blogging, wiki pages, alerts etc. A major feature added is User Profile.
SharePoint 2010 has features like Enterprise content type, Metadata and navigation, Document sets, Audio and video content type.
Also it supports remote blog storage.
SharePoint supports other microsoft product services like Performance Point Services, Excel Services, Access Services, Visio Services, PowerPivot, Microsoft SQL Server Reporting Services, and so on.