You can see the Updates and the differences in below link. http://expertsharepoint.blogspot.com/2013/10/features-in-sharepoint-2013-preview.html

Have a look...http://www.learningsharepoint.com/wp-content/uploads/2013/02/101-New-Features-in-SharePoint-2013.pdf

They Have lot of Features is there in SharePoint 2013 compare to SharePoint 2010. Some of Following: 1. Visual WebPart supporting Sandbox Solution. 2. Goggle Maps 3.Mobile Devices office Web Apps