The SharePoint 2013 is now released. What is New in SharePoint 2013 ? What are they added in SharePoint 2013 then SharePoint 2010 ? What are the new features ?
Everything you need to know can be found here: http://technet.microsoft.com/en-us/sharepoint/fp142374.aspx
Vesa "vesku" Juvonen has a nice post with SharePoint 2013 IT Pro and Developer training materials released.
These give you a nice overview what is new in SharePoint 2013 for the IT Pro and the developer.
There is also a good podcast on Dot net Rocks With Sahil Malik http://s3.amazonaws.com/dnr/dotnetrocks_0794_sahil_malik.mp3
These are the possible improvements:
User Experience Improvements
User Interface o Minimal Download Strategy o Site Navigation o Sharing Social Enhancements o User Profiles o My Sites o Taxonomy o Microblogs o Newsfeed Document Management Enhancements o Office Integration Differences o Office Web Apps Licensing Information
Visual Studio Tooling Enhancements
Apps for SharePoint
Introduction to NAPA Visual Studio App Project Hosting Options o SharePoint Hosted o Provider Hosted o Azure Auto-hosted App Security
Server OM o Profile/social o Taxonomy o Search APIs Client OM improvements REST API additions and changes
UI Branding Enhancements
Design Manager o Improvements in Master Page, Page Layout design o Design Packaging Client Side Rendering
Configuration Management Changes
Search Service Application o Site Collection o Site Query Rules Query Result Display Templates API Changes Client Side API Server Query API Content By Search Web Part
Web Content Management Content Creation Changes Managed Navigation and category pages Image Renditions, image processing improvements Cross-Site Publishing and publishing content across site collections Variation Changes Channels and device-specific targeting Analytics
Architecture o .NET 4.0 o Workflow Manager and Windows Azure Host Out of the box Workflows New Workflow Activities Developing Custom Visual Studio Workflows Developing Custom Activities