Very First What are the new features of SharePoint2013?

in a developer standpoint below are the categories where enchantments made

• Cloud App Model 
• Familiar programming model using web standards 
• Development tools 
• Core platform enhancements 
• Mobility 
• Social and collaboration 
• Search 
• Workflows 
• Enterprise Content Management 
• Business Connectivity Services 
• Application services 
• Additional resources

explore more at http://msdn.microsoft.com/en-us/library/office/jj163091(v=office.15).aspx

                          http://msdn.microsoft.com/en-us/library/office/jj870830(v=office.15).aspx